bfd creates the output file early, so calling exit(0) is not enough, the file needs to be explicitly deleted.
Patch by: H.J. Lu <hjl.tools@gmail.com>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228946 91177308-0d34-0410-b5e6-96231b3b80d8