[mips] Align the stack to 16-bytes for -mfp64.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193640 91177308-0d34-0410-b5e6-96231b3b80d8
Add support for the separate version of /FI.

Patch by Jeff Muizelaar.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193642 91177308-0d34-0410-b5e6-96231b3b80d8
Add -lm to sanitizer link arguments.

We'll need to intercept a few function in libm.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193644 91177308-0d34-0410-b5e6-96231b3b80d8