[PATCH] Do not define the gcc style target specific pre-defined preprocessor macros in clang-cl

[Ehsan Akhgari]

In our code base I think it's only occurrence of this problem, but I do
expect this to be the sort of thing that breaks more than just libyuv in
the wild.  That being said, I'll leave it up to you whether we should take
this or not, and will address the comment below when landing if we decide
to to do so.

Cheers,

--
Ehsan
<http://ehsanakhgari.org/>

http://reviews.llvm.org/D4415