[PATCH] Use ".arch_extension" ARM directive to specify the additional CPU features

[Sumanth Gundapaneni]

I have updated the patch with the support for krait hwdiv. ".arch_extension" is used to compute the feature bits for krait.
I have also updated a test case testing both the paths suggested by Renato


http://reviews.llvm.org/D7316

Files:
  include/llvm/MC/MCStreamer.h
  lib/Target/ARM/ARMAsmPrinter.cpp
  lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
  lib/Target/ARM/MCTargetDesc/ARMTargetStreamer.cpp
  test/CodeGen/ARM/krait-cpu-div-attribute.ll

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