* os_dep.c (defined(MPROTECT_VDB) && defined(DARWIN)): Moved recently
	added defines to include/private/gc_priv.h
	* darwin_stop_world.c: Removed the above defines.
	(catch_exception_raise): Added THREAD_FLD in exc_state for POWERPC too.
	* include/private/gc_priv.h: Moved definitions from darwin_stop_world.c
	and os_dep.c to here. Fixed THREAD definition fixes for ppc64.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@120977 138bc75d-0d04-0410-961f-82ee72b054a4