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

[hfinkel at anl.gov]

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Comment at: /home/seurer/llvm/llvm-test/projects/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h:52
@@ +51,3 @@
+  static const int OFFSET_TO_PC_IN_FRAME = 2;
+  static const bool FAST_UNWIND_MAY_NEED_TO_POP_FRAMES = true;
+#else
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What is special about PPC that makes this true?

http://reviews.llvm.org/D9259

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