[PATCH] D28223: clean up use of _WIN32

[Saleem Abdulrasool via Phabricator via cfe-commits]

compnerd added a comment.

I figured that using the explicit encoding is nicer since it means that its more documenting.  I dont have a problem with `_LIBCPP_SHORT_WCHAR` as that maps quite well to `-fshort-wchar`.


Repository:
  rL LLVM

https://reviews.llvm.org/D28223