Enable java for aarch64

	* configure.ac (aarch64-*-*): Don't disable java.
	* configure: Regenerate.

libjava/:
	* configure.host: Add support for aarch64.
	* sysdep/aarch64/locks.h: New file.

libjava/classpath/:
	* native/fdlibm/ieeefp.h: Add support for aarch64.

From-SVN: r197997