[llvm-readobj] Use LLVMDebugInfoCodeView to parse line tables.

The llvm-readobj parsing code currently exists in our CodeView
library, so we use that to parse instead of re-writing the logic
in the tool.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301718 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed