Add DW_AT_GNU_odr_signature to the set of dwarf attributes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186296 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Dwarf.cpp b/lib/Support/Dwarf.cpp
index 0f91c11..8a80139 100644
--- a/lib/Support/Dwarf.cpp
+++ b/lib/Support/Dwarf.cpp
@@ -230,6 +230,7 @@
   case DW_AT_body_end:                   return "DW_AT_body_end";
   case DW_AT_GNU_vector:                 return "DW_AT_GNU_vector";
   case DW_AT_GNU_template_name:          return "DW_AT_GNU_template_name";
+  case DW_AT_GNU_odr_signature:          return "DW_AT_GNU_odr_signature";
   case DW_AT_MIPS_assumed_size:          return "DW_AT_MIPS_assumed_size";
   case DW_AT_lo_user:                    return "DW_AT_lo_user";
   case DW_AT_hi_user:                    return "DW_AT_hi_user";