Summary: Add tag bit to all JNI weak handles
Reviewed-by: kbarrett, coleenp, tschatzl

Reviewed-by: goetz

Reviewed-by: goetz

Reviewed-by: goetz, mdoerr
Contributed-by: NHiroshi H Horii <horii@jp.ibm.com>

Reviewed-by: goetz

Reviewed-by: roland, kvn

Reviewed-by: kvn

Reviewed-by: kvn, coleenp
Contributed-by: axel.siebenborn@sap.com, martin.doerr@sap.com

Summary: ELFv2 ABI used by the little endian PowerPC64 on Linux.
Reviewed-by: kvn
Contributed-by: asmundak@google.com

Reviewed-by: kvn

Reviewed-by: coleenp, kvn

Summary: With this change the HotSpot core build works on Linux/PPC64. The VM succesfully executes simple test programs.
Reviewed-by: kvn