Fix "bad source file" error during beaninfo generation

[ filing this on behalf of Thomas Fitzsimmons fitzsim at redhat.com ]

I saw two occurrences of a GitHub Actions pre-submit check build failure during beaninfo generation with a "bad source file" error. Here is an example from https://github.com/gnu-andrew/jdk8u-dev/actions/runs/7979614913/job/21787468883 :

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Generating beaninfo
Generating Nimbus source files
Error: encoded value was less than 0: encode(-8.326673E-17, 5.0, 11.0, 16.0)
Error: encoded value was less than 0: encode(-0.05882353, 1.0, 24.0, 25.0)
Error: encoded value was greater than 3: encode(15.029411, 1.0, 14.0, 15.0)
Error: encoded value was less than 0: encode(-0.05882353, 1.0, 24.0, 25.0)
Error: encoded value was greater than 3: encode(15.029411, 1.0, 14.0, 15.0)
Error: encoded value was less than 0: encode(-0.05882353, 1.0, 24.0, 25.0)
Error: encoded value was less than 0: encode(-0.05882353, 1.0, 24.0, 25.0)
Error: encoded value was greater than 3: encode(15.029411, 1.0, 14.0, 15.0)
Error: encoded value was less than 0: encode(-0.05882353, 1.0, 24.0, 25.0)
Error: encoded value was greater than 3: encode(15.029411, 1.0, 14.0, 15.0)
Error: encoded value was less than 0: encode(-0.05882353, 1.0, 24.0, 25.0)
Error: encoded value was less than 0: encode(-0.05882353, 1.0, 24.0, 25.0)
Error: encoded value was greater than 3: encode(15.029411, 1.0, 14.0, 15.0)
Error: encoded value was less than 0: encode(-0.05882353, 1.0, 24.0, 25.0)
Error: encoded value was greater than 3: encode(15.029411, 1.0, 14.0, 15.0)
Error: encoded value was less than 0: encode(-0.05882353, 1.0, 24.0, 25.0)
Error: Encountered Infinity: encode(-0.00877193, 0.0, 7.0, 7.0)
d:\a\jdk8u-dev\jdk8u-dev\jdk\jdk\src\share\classes\java\nio\channels\spi\AbstractSelectableChannel.java:33: error: cannot access IllegalSelectorException
import java.nio.channels.IllegalSelectorException;
                        ^
  bad source file: d:\a\jdk8u-dev\jdk8u-dev\jdk\build\windows-x64\jdk\gensrc\java\nio\channels\IllegalSelectorException.java
    file does not contain class java.nio.channels.IllegalSelectorException
    Please remove or make sure it appears in the correct subdirectory of the sourcepath.
d:\a\jdk8u-dev\jdk8u-dev\jdk\jdk\src\share\classes\java\nio\channels\spi\AbstractSelectableChannel.java:68: error: cannot find symbol
    private SelectionKey[] keys = null;
            ^
  symbol: class SelectionKey
  location: class AbstractSelectableChannel
d:\a\jdk8u-dev\jdk8u-dev\jdk\jdk\src\share\classes\java\nio\channels\spi\AbstractSelectableChannel.java:102: error: cannot find symbol
    private void addKey(SelectionKey k) {
                        ^
  symbol: class SelectionKey
  location: class AbstractSelectableChannel
d:\a\jdk8u-dev\jdk8u-dev\jdk\jdk\src\share\classes\java\nio\channels\spi\AbstractSelectableChannel.java:125: error: cannot find symbol
    private SelectionKey findKey(Selector sel) {
                                 ^
  symbol: class Selector
  location: class AbstractSelectableChannel
d:\a\jdk8u-dev\jdk8u-dev\jdk\jdk\src\share\classes\java\nio\channels\spi\AbstractSelectableChannel.java:125: error: cannot find symbol
    private SelectionKey findKey(Selector sel) {
            ^
  symbol: class SelectionKey
  location: class AbstractSelectableChannel
d:\a\jdk8u-dev\jdk8u-dev\jdk\jdk\src\share\classes\java\nio\channels\spi\AbstractSelectableChannel.java:136: error: cannot find symbol
    void removeKey(SelectionKey k) { // package-private
                   ^
  symbol: class SelectionKey
  location: class AbstractSelectableChannel
d:\a\jdk8u-dev\jdk8u-dev\jdk\jdk\src\share\classes\java\nio\channels\spi\AbstractSelectableChannel.java:168: error: cannot find symbol
    public final SelectionKey keyFor(Selector sel) {
                                     ^
  symbol: class Selector
  location: class AbstractSelectableChannel
d:\a\jdk8u-dev\jdk8u-dev\jdk\jdk\src\share\classes\java\nio\channels\spi\AbstractSelectableChannel.java:168: error: cannot find symbol
    public final SelectionKey keyFor(Selector sel) {
                 ^
  symbol: class SelectionKey
  location: class AbstractSelectableChannel
d:\a\jdk8u-dev\jdk8u-dev\jdk\jdk\src\share\classes\java\nio\channels\spi\AbstractSelectableChannel.java:198: error: cannot find symbol
    public final SelectionKey register(Selector sel, int ops,
                                       ^
  symbol: class Selector
  location: class AbstractSelectableChannel
d:\a\jdk8u-dev\jdk8u-dev\jdk\jdk\src\share\classes\java\nio\channels\spi\AbstractSelectableChannel.java:198: error: cannot find symbol
    public final SelectionKey register(Selector sel, int ops,
                 ^
  symbol: class SelectionKey
  location: class AbstractSelectableChannel
d:\a\jdk8u-dev\jdk8u-dev\jdk\jdk\src\share\classes\java\nio\channels\spi\AbstractSelectableChannel.java:289: error: cannot find symbol
    public final SelectableChannel configureBlocking(boolean block)
                 ^
  symbol: class SelectableChannel
  location: class AbstractSelectableChannel
make[2]: *** [gensrc/GensrcSwing.gmk:79: /cygdrive/d/a/jdk8u-dev/jdk8u-dev/jdk/build/windows-x64/jdk/gensrc_no_srczip/_the.generated_beaninfo] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [BuildJdk.gmk:55: gensrc-only] Error 2
make: *** [/cygdrive/d/a/jdk8u-dev/jdk8u-dev/jdk//make/Main.gmk:117: jdk-only] Error 2
Error: Process completed with exit code 1.
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