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

[Alexey Samsonov]

  > Re: building tests: yes, adding -D_SIZE_T_DECLARED to COMPILER_RT_GTEST_INCLUDE_CFLAGS (set in cmake/Modules/AddCompilerRT.cmake) does the work.

  Let's do it that way then. I've renamed this var to COMPILER_RT_GTEST_CFLAGS. We can add -D_SIZE_T_DECLARED to it on FreeBSD 9.2.

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