java/nio/channels/FileChannel/LargeMapTest.java fails on 32-bit systems

```
$ CONF=linux-x86-server-fastdebug make images run-test TEST=java/nio/channels/FileChannel/LargeMapTest.java

STDOUT:
32
i386
19-internal
STDERR:
java.io.IOException: Map failed
at java.base/sun.nio.ch.FileChannelImpl.mapInternal(FileChannelImpl.java:1322)
at java.base/sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:1221)
at LargeMapTest.main(LargeMapTest.java:66)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:1585)
Caused by: java.lang.OutOfMemoryError: Map failed
at java.base/sun.nio.ch.FileChannelImpl.map0(Native Method)
at java.base/sun.nio.ch.FileChannelImpl.mapInternal(FileChannelImpl.java:1319)
... 6 more
```

I think we cannot assume we would be able to map >4G on 32-bit system.

Currently obscured by JDK-8287137, would manifest again after JDK-8287520.