Output function name in clang-tv quiet mode error message (#1172)

Author: jmciver

tools/transform.cpp

@@ -167,9 +167,9 @@ static bool error(Errors &errs, State &src_state, State &tgt_state,
     }
   }
 
-  // Return early if instance reporting is not requested.
   if (config::quiet) {
-    errs.add(msg, true);
+    s << msg << " in " << src_state.getFn().getName() << '\n';
+    errs.add(std::move(s).str(), true);
     return false;
   }