wire up a new -fno-builtin option, make it control things like simplifylibcalls,
etc and make freestanding imply it.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66972 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index a51f432..80e1774 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -39,7 +39,7 @@
 {  
   if (size_reserve > 0) Types.reserve(size_reserve);    
   InitBuiltinTypes();
-  BuiltinInfo.InitializeBuiltins(idents, Target, LangOpts.Freestanding);
+  BuiltinInfo.InitializeBuiltins(idents, Target, LangOpts.NoBuiltin);
   TUDecl = TranslationUnitDecl::Create(*this);
 }