Add code modification hints to various parsing-related diagnostics.

Plus, reword a extension warnings to avoid talking about "ISO C" when
the extension might also be available in C++ or C++0x. 



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68257 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseExprCXX.cpp b/lib/Parse/ParseExprCXX.cpp
index 5865771..f00eddd 100644
--- a/lib/Parse/ParseExprCXX.cpp
+++ b/lib/Parse/ParseExprCXX.cpp
@@ -608,7 +608,7 @@
   // GNU typeof support.
   case tok::kw_typeof:
     ParseTypeofSpecifier(DS);
-    DS.Finish(Diags, PP.getSourceManager(), getLang());
+    DS.Finish(Diags, PP);
     return;
   }
   if (Tok.is(tok::annot_typename))
@@ -616,7 +616,7 @@
   else
     DS.SetRangeEnd(Tok.getLocation());
   ConsumeToken();
-  DS.Finish(Diags, PP.getSourceManager(), getLang());
+  DS.Finish(Diags, PP);
 }
 
 /// ParseCXXTypeSpecifierSeq - Parse a C++ type-specifier-seq (C++