[ARM] Multilib support for ARMv8.1.

	* config/arm/t-aprofile: Make "armv8.1-a" and "armv8.1-a+crc"
	matches for "armv8-a".

From-SVN: r231680

gcc/ChangeLog

 2015-12-16  Matthew Wahab  <matthew.wahab@arm.com>
 
+	* config/arm/t-aprofile: Make "armv8.1-a" and "armv8.1-a+crc"
+	matches for "armv8-a".
+
+2015-12-16  Matthew Wahab  <matthew.wahab@arm.com>
+
 	* config/arm/arm-arches.def: Add "armv8.1-a" and "armv8.1-a+crc".
 	* config/arm/arm-protos.h (FL2_ARCH8_1): New.
 	(FL2_FOR_ARCH8_1A): New.

gcc/config/arm/t-aprofile

@@ -98,6 +98,8 @@ MULTILIB_MATCHES       += march?armv8-a=mcpu?xgene1
 
 # Arch Matches
 MULTILIB_MATCHES       += march?armv8-a=march?armv8-a+crc
+MULTILIB_MATCHES       += march?armv8-a=march?armv8.1-a
+MULTILIB_MATCHES       += march?armv8-a=march?armv8.1-a+crc
 
 # FPU matches
 MULTILIB_MATCHES       += mfpu?vfpv3-d16=mfpu?vfpv3