[PATCH] Emit ABI_PCS_R9_use build attribute.

[Saleem Abdulrasool]

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Comment at: include/llvm/Support/ARMBuildAttributes.h:150
@@ +149,3 @@
+  // Tag_ABI_PCS_R9_use, (=14), uleb128
+  R9IsGPR = 0, // R9 used as v6 (just another callee-saved register)
+  R9IsSB = 1, // R9 used as a global static base rgister
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Aligning the comments would be nice.

http://reviews.llvm.org/D4657