8019922: PPC64 (part 8): Implement Linux/PPC64 support in HotSpot makefiles
Summary: HotSpot make changes to build the HotSpot on Linux/PPC64
Reviewed-by: dholmes, kvn
os_family = linux
arch = ppc
arch_model = ppc_64
os_arch = linux_ppc
os_arch_model = linux_ppc_64
lib_arch = ppc64
compiler = gcc
gnu_dis_arch = ppc64
sysdefs = -DLINUX -D_GNU_SOURCE -DPPC64