[PATCH] add supporting of the sanitizer arguments into Clang on FreeBSD platform.

[Viktor Kutuzov]

  OK, it looks there is a lot of details that require deep and careful analysis against recent revisions--more than I could do with the current level of the sanitizers support on FreeBSD. So, I propose we defer this patch untill we need it to run the tests and then make as small changes as possible and only if necessary. Please let me know if you think that would work. Thanks.

http://llvm-reviews.chandlerc.com/D2644