8171392: Move Klass pointers outside of ConstantPool entries so ConstantPool can be read-only
Summary: Added _resolved_klasses; moved _resolved_references to ConstantPoolCache, etc.
Reviewed-by: coleenp, lfoltan, simonis, aph

8155980: ARM InterpreterMacroAssembler::get_method_counters() should not be saving caller saved registers
Summary: make get_method_counters() only save registers specified by caller, not all of them
Reviewed-by: dlong, jiangli

8168503: JEP 297: Unified arm32/arm64 Port
Reviewed-by: kvn, enevill, ihse, dholmes, erikj, coleenp, cjplummer