* jni.cc: Include IdentityHashMap.h, not Hashtable.h.
	(local_ref_table, global_ref_table): Now IdentityHashMap.
	(_Jv_JNI_Init): Updated for new types.
	(mark_for_gc): Likewise.
	(unmark_for_gc): Likewise.
	* gcj/javaprims.h: Rebuilt class list.
	* Makefile.in: Rebuilt.
	* Makefile.am (core_java_source_files): Added new file.
	* java/util/IdentityHashMap.java: New file.

From-SVN: r44929