[lld] Fix win7 failure on adding InputGraph functionality

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@188961 91177308-0d34-0410-b5e6-96231b3b80d8
[lld][Darwin] fixing an accidentally removed change

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@188963 91177308-0d34-0410-b5e6-96231b3b80d8