there are a dozen binary files in hotspot/test, we should get rid of them.

./runtime/7116786/testcases.jar : application/java-archive; charset=binary
./runtime/ClassFile/JsrRewritingTestCase.jar : application/java-archive; charset=binary
./runtime/ClassFile/testcase.jar : application/java-archive; charset=binary
./runtime/classFileParserBug/emptynumbootstrapmethods.jar : application/java-archive; charset=binary
./runtime/classFileParserBug/test.jar : application/java-archive; charset=binary
./runtime/duplAttributes/test.jar : application/java-archive; charset=binary
./runtime/EnclosingMethodAttr/enclMethodAttr.jar : application/java-archive; charset=binary
./runtime/LoadClass/dummy.jar : inode/x-empty; charset=binary
./runtime/LocalVariableTable/testcase.jar : application/java-archive; charset=binary