Build crt*vr.S with AltiVec enabled

These files won't build on targets that do not have AltiVec enabled,
breaking the build, unless we tell GAS that Altivec insns are fine.
The alternative is to not build these files in that case, which is much
more complicated.


libgcc/
	* config/rs6000/crtrestvr.s: Use .machine altivec.
	* config/rs6000/crtsavevr.s: Ditto.

From-SVN: r246051

libgcc/ChangeLog

 2017-03-10  Segher Boessenkool  <segher@kernel.crashing.org>
 
+	* config/rs6000/crtrestvr.s: Use .machine altivec.
+	* config/rs6000/crtsavevr.s: Ditto.
+
+2017-03-10  Segher Boessenkool  <segher@kernel.crashing.org>
+
 	* configure.ac (test for libgcc_cv_powerpc_float128): Temporarily
 	modify CFLAGS.  Add -mabi=altivec -mvsx -mfloat128.
 	(test for libgcc_cv_powerpc_float128_hw): Add -mpower9-vector and

libgcc/config/rs6000/crtrestvr.S

@@ -31,6 +31,7 @@
 
 /* Called with r0 pointing just beyond the end of the vector save area.  */
 
+	.machine altivec
 	.section ".text"
 CFI_STARTPROC
 HIDDEN_FUNC(_restvr_20)

libgcc/config/rs6000/crtsavevr.S

@@ -31,6 +31,7 @@
 
 /* Called with r0 pointing just beyond the end of the vector save area.  */
 
+	.machine altivec
 	.section ".text"
 CFI_STARTPROC
 HIDDEN_FUNC(_savevr_20)