* Makefile.am (core_java_source_files): add InheritableThreadLocal
	* Makefile.in: regenerate
	* gcj/javaprims.h: ditto
	* java/lang/InheritableThreadLocal.java: new class from Classpath
	* java/lang/Thread.java Thread (Thread, ThreadGroup, Runnable, String):
	call InheritableThreadLocal.newChildThread()

From-SVN: r45979