[llvm-readobj] Support -needed-libs option for COFF files

This implements the -needed-libs option in the COFF dumper.

Differential Revision: https://reviews.llvm.org/D41529

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321498 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed