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/Parser.cpp b/lib/Parse/Parser.cpp
index 8903da2..5b38f60 100644
--- a/lib/Parse/Parser.cpp
+++ b/lib/Parse/Parser.cpp
@@ -372,7 +372,8 @@
   DeclPtrTy SingleDecl;
   switch (Tok.getKind()) {
   case tok::semi:
-    Diag(Tok, diag::ext_top_level_semi);
+    Diag(Tok, diag::ext_top_level_semi)
+      << CodeModificationHint::CreateRemoval(SourceRange(Tok.getLocation()));
     ConsumeToken();
     // TODO: Invoke action for top-level semicolon.
     return DeclGroupPtrTy();