[PATCH] D15883: Add ARM EHABI-related constants to unwind.h.

[Saleem Abdulrasool via cfe-commits]

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These should be guarded by a check to ensure that they are not defined when EHABI is not in effect at @nbjoerg pointed out.  You could use the same check as libunwind:

  defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && !defined(__ARM_DWARF_EH__)


http://reviews.llvm.org/D15883