Avoid hardcoding PC addresses in a dwarf test

The PCs appear to vary from builder-to-builder:

  http://lab.llvm.org:8011/builders/clang-ppc64be-linux-lnt/builds/20053

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@343886 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed