Revert "[DEBUGINFO] Add flag for DWARF2 or less to use sections as references."

This reverts commit r326328 to remove checks for emission of certain
sections after discussion with Eric Christofer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326436 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed