Pull in changes from HEAD
	* gendef (_sigfe): 16-byte align xmm0 storage and use movdqa.
	(_sigbe): Fix alignment before calling yield.  Use movdqa to save and
	restore xmm0.
	(sigdelayed): Use movdqa to save and restore xmm0.
	(_ZN7_cygtls4lockEv): Change absolute values to hex.
	(stabilize_sig_stack): Ditto.
	(setjmp): Add comment to explain usage of movdqu.
	(__sjfault): Ditto.
	(__ljfault): Ditto.
	(longjmp): Ditto. Access return value using 32 bit opcodes only.
	* miscfuncs.cc (thread_wrapper): Don't attempt to copy exception
	handler list on x86_64.