Add MINGW_LIBRARIES to the linker flags
Add MINGW_LIBRARIES to the linker flags

This is essential when building with -nodefaultlibs.

This is similar to what already is done in libcxxabi in SVN r302760.

Differential revision: https://reviews.llvm.org/D37207

git-svn-id: 756ef344af921d95d562d9e9f9389127a89a6314@312498 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx