[PATCH] ARM: change attribute tests to use parsed form

[Renato Golin]

  Thanks Saleem, LGTM!


================
Comment at: test/MC/ARM/directive-arch-armv6-m.s:27
@@ +26,3 @@
+@ CHECK-ATTR:     TagName: THUMB_ISA_use
+@ CHECK-ATTR:     Description: Thumb-1
+@ CHECK-ATTR:   }
----------------
Hum, v6M (M0, M0+, M1) also has Thumb2.


http://llvm-reviews.chandlerc.com/D2684