Merge

7066841: remove MacroAssembler::br_on_reg_cond() on sparc Summary: Remove the macro assembler routine br_on_reg_cond() and replace the remaining calls to that routine with an equivalent. Reviewed-by: kvn, iveresov

7082645: Hotspot doesn't compile on old linuxes after 7060836 Summary: Move syscall ids definitions into os_linux.cpp Reviewed-by: johnc

7080389: G1: refactor marking code in evacuation pause copy closures Summary: Refactor code marking code in the evacuation pause copy closures so that an evacuated object is only marked by the thread that successfully copies it. Reviewed-by: stefank, brutisso, tonyp