[WinLink] Fix use-after-return.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@183603 91177308-0d34-0410-b5e6-96231b3b80d8
[PECOFF][Driver] Add -stack command line option.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@183604 91177308-0d34-0410-b5e6-96231b3b80d8