Fix typo. add a test case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101812 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Dwarf.cpp b/lib/Support/Dwarf.cpp
index 9a6285b..c19c2d6 100644
--- a/lib/Support/Dwarf.cpp
+++ b/lib/Support/Dwarf.cpp
@@ -198,7 +198,7 @@
   case DW_AT_APPLE_block:                return "DW_AT_APPLE_block";
   case DW_AT_APPLE_major_runtime_vers:   return "DW_AT_APPLE_major_runtime_vers";
   case DW_AT_APPLE_runtime_class:        return "DW_AT_APPLE_runtime_class";
-  case DW_AT_APPLE_omit_frame_ptr:       return "DW_APPLE_omit_frame_ptr";
+  case DW_AT_APPLE_omit_frame_ptr:       return "DW_AT_APPLE_omit_frame_ptr";
   }
   return 0;
 }