[PATCH] [asan] rewrite asan's stack frame layout

[Kostya Serebryany]

  use more LLVM's ADR's and llvm namespace, added a lit test.

Hi samsonov, dvyukov,

http://llvm-reviews.chandlerc.com/D2324

CHANGE SINCE LAST DIFF
  http://llvm-reviews.chandlerc.com/D2324?vs=5902&id=5924#toc

Files:
  unittests/Transforms/Utils/CMakeLists.txt
  unittests/Transforms/Utils/ASanStackFrameLayoutTest.cpp
  lib/Transforms/Utils/CMakeLists.txt
  lib/Transforms/Utils/ASanStackFrameLayout.cpp
  lib/Transforms/Instrumentation/AddressSanitizer.cpp
  test/Instrumentation/AddressSanitizer/stack_layout.ll
  include/llvm/Transforms/Utils/ASanStackFrameLayout.h
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