add feature flags required post rebase.

Author: pnkfelix

src/test/run-pass/drop-flag-sanity-check.rs

@@ -17,6 +17,8 @@
 //
 // See also drop-flag-skip-sanity-check.rs.
 
+#![feature(old_io)]
+
 use std::env;
 use std::old_io::process::{Command, ExitSignal, ExitStatus};
 

src/test/run-pass/drop-flag-skip-sanity-check.rs

@@ -17,6 +17,8 @@
 //
 // See also drop-flag-sanity-check.rs.
 
+#![feature(old_io)]
+
 use std::env;
 use std::old_io::process::{Command, ExitSignal, ExitStatus};
 

src/test/run-pass/intrinsic-move-val.rs

@@ -13,6 +13,7 @@
 #![allow(unknown_features)]
 #![feature(box_syntax)]
 #![feature(intrinsics)]
+#![feature(filling_drop)] // needed to check for drop fill word.
 
 use std::mem::{self, transmute};