[PATCH] clang-cl: Map /Zi[-] to -f[no-]builtin

[Hans Wennborg]

  > /Zi and /ZI have to do with pdb debug info. :) /Oi does intrinsics. I suppose we could map /Oi- to -fno-builtin.

  Gah, I've conflated the flags. At least this explains why the patch was in a branch called "Oi_flag" in my git repo :) New patch coming up.

http://llvm-reviews.chandlerc.com/D1328