[PATCH] [PowerPC]Adapt fast stack unwinding to work for Power.

[Bill Seurer]

One more thing I should mention is that the fast unwinding without popping the extra frames causes 7 test cases to fail though fixing them would probably not be all that difficult.

Failing Tests (7):

  AddressSanitizer-powerpc64le-linux :: TestCases/Linux/stack-trace-dlclose.cc
  AddressSanitizer-powerpc64le-linux :: TestCases/double-free.cc
  AddressSanitizer-powerpc64le-linux :: TestCases/large_func_test.cc
  AddressSanitizer-powerpc64le-linux :: TestCases/strncpy-overflow.cc
  AddressSanitizer-powerpc64le-linux :: TestCases/use-after-delete.cc
  AddressSanitizer-powerpc64le-linux :: TestCases/use-after-free-right.cc
  AddressSanitizer-powerpc64le-linux :: TestCases/use-after-free.cc


http://reviews.llvm.org/D9259

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