[PATCH] A couple minor changes to support sanitizers on FreeBSD 9.2

[Viktor Kutuzov]

  > Can we instead #define _SIZE_T_DECLARED in source files? Maybe we can add this to lib/sanitizer_common/tests/sanitizer_test_utils.h

  That would require several headers to be altered or otherwise the headers in the unittests sources will be forced to come in a specific order. Neither of the ways is better than a single change in the ##CMakeLists.txt##, I guess?

http://llvm-reviews.chandlerc.com/D3031