Turn on ASTScopes

Author: David Ungar

include/swift/Basic/LangOptions.h

@@ -246,7 +246,7 @@ namespace swift {
     /// Default is in \c ParseLangArgs
     ///
     /// This is a staging flag; eventually it will be removed.
-    bool EnableASTScopeLookup = false;
+    bool EnableASTScopeLookup = true;
 
     /// Someday, ASTScopeLookup will supplant lookup in the parser
     bool DisableParserLookup = false;