Factor the Unit section parsing into the DWARFUnitSection class.

Summary: No functional change.

Reviewers: dblaikie, samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5522

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219098 91177308-0d34-0410-b5e6-96231b3b80d8
[dwarfdump] Print the name for referenced specification of abstract_origin DIEs.

Reviewers: dblaikie, samsonov, echristo, aprantl

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5466

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219099 91177308-0d34-0410-b5e6-96231b3b80d8