Revert r231545 to unbreak buildbot.
Revert r231545 to unbreak buildbot.

This patch reverts r231545 "PECOFF: Do not add extraneous symbols
to the dead strip root." CrWinClangLLD buildbot is currently broken.
Since I can't reproduce the issue locally, I'm reverting the most
relevant change.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@231582 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld