Removed a string literal for a diagnostic, and updated the diagnostic to not manually quote. No functional changes intended.

llvm-svn: 198076
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index 56e8725..aaaa2b35 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -2959,7 +2959,7 @@
     OldTy = VD->getType();
   else {
     S.Diag(D->getLocation(), diag::err_attr_wrong_decl)
-      << "mode" << Attr.getRange();
+      << Attr.getName() << Attr.getRange();
     return;
   }