Mark ARM subtarget features that are available for the assembler.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117929 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/MC/ARM/neon-add-encoding.s b/test/MC/ARM/neon-add-encoding.s
index 6211a3e..632657a 100644
--- a/test/MC/ARM/neon-add-encoding.s
+++ b/test/MC/ARM/neon-add-encoding.s
@@ -1,4 +1,4 @@
-// RUN: llvm-mc -triple armv7-apple-darwin -show-encoding < %s | FileCheck %s
+// RUN: llvm-mc -mcpu=cortex-a8 -triple armv7-apple-darwin -show-encoding < %s | FileCheck %s
 
 
 // CHECK: vadd.i8	d16, d17, d16           @ encoding: [0xa0,0x08,0x41,0xf2]