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

libjava/classpath/native/fdlibm/ieeefp.h

@@ -4,6 +4,14 @@
 #ifndef __IEEE_BIG_ENDIAN
 #ifndef __IEEE_LITTLE_ENDIAN
 
+#ifdef __aarch64__
+#ifdef __AARCH64EB__
+#define __IEEE_BIG_ENDIAN
+#else
+#define __IEEE_LITTLE_ENDIAN
+#endif
+#endif
+
 #ifdef __alpha__
 #define __IEEE_LITTLE_ENDIAN
 #endif