Revert "[ELF][AllArchs] Fix includes"

This reverts commit e137dd93e1291a2d2fa7f41c8f8bcdb59c8b3225.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@219313 91177308-0d34-0410-b5e6-96231b3b80d8