ReaderWriter depends on Passes.


git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@189751 91177308-0d34-0410-b5e6-96231b3b80d8
Recognize -Bshareable as alias for -shared.


git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@189752 91177308-0d34-0410-b5e6-96231b3b80d8