[PATCH] Add -funwind-tables to CMAKE_C_FLAGS.

[Dan Albert]

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Comment at: cmake/config-ix.cmake:7
@@ -6,2 +6,3 @@
 check_cxx_compiler_flag(-fstrict-aliasing     LIBCXXABI_HAS_FSTRICT_ALIASING_FLAG)
+check_cxx_compiler_flag(-funwind-tables       LIBCXXABI_HAS_FUNWIND_TABLES)
 check_cxx_compiler_flag(-nodefaultlibs        LIBCXXABI_HAS_NODEFAULTLIBS_FLAG)
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Shouldn't this be `check_c_compiler_flag`?

http://reviews.llvm.org/D7099

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