Fix a link issue I ran into trying compiling LLVM on MinGW with CMake.  
Hopefully this doesn't break anyone else's build... it shouldn't unless 
the MinGW variable means something other than compiling with MinGW.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60273 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed