Update test/DebugInfo/2010-04-06-NestedFnDbgInfo.ll to use FileCheck.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209187 91177308-0d34-0410-b5e6-96231b3b80d8
Follow up to 209187, updating a test to use FileCheck. Needed to ignore an extra DW_TAG_class_type

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209188 91177308-0d34-0410-b5e6-96231b3b80d8