Reorganize built-in initialization to separate the creation of target builtins from marking IdentifierInfos as builtins. No functionality change

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69774 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index f156ac4..02bedca 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -41,7 +41,8 @@
   ExternalSource(0) {  
   if (size_reserve > 0) Types.reserve(size_reserve);    
   InitBuiltinTypes();
-  BuiltinInfo.InitializeBuiltins(idents, Target, LangOpts.NoBuiltin);
+  BuiltinInfo.InitializeTargetBuiltins(Target);
+  BuiltinInfo.InitializeBuiltins(idents, LangOpts.NoBuiltin);
   TUDecl = TranslationUnitDecl::Create(*this);
 }