[PATCH] Interception macros for sanitizers on FreeBSD

[Kostya Serebryany]

  on the other hand, suppose someone comes with a patch for OpenBSD.
  Will we then have names with _linux_or_freebsd_or_openbsd?

  >> if I were a developer seeking for FreeBSD-specific things.
  In this case you would still find "defined(FreeBSD)"

  Anyway, I don't feel strong about this, I'm just lazy to rename the files.
  What about the patch as it is, just w/o changing the file names?

http://llvm-reviews.chandlerc.com/D2828