bump retaddr here.

	* include/powerpc-signal.h: Revert 2004-01-21 change.
	(INIT_SEGV, INIT_FPE): Provide powerpc64 versions.  Check return
	from syscall for ppc32 versions.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@77601 138bc75d-0d04-0410-961f-82ee72b054a4