Revert "Update debug info test for schema change made to LLVM."

This reverts commit 5035c483b7fcbf0fa2a7afba24fa35a10995d195.

This schema change wasn't necessary after all. I'm going ith a different
solution that will hopefully use space more conservatively.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178213 91177308-0d34-0410-b5e6-96231b3b80d8