Merge pull request rust-lang#198 from dwrensha/update-compiletest

update compiletest and remove obsolete comment

Author: oli-obk

Cargo.lock

@@ -1,7 +1,6 @@
 // aux-build:dep.rs
 
 // ignore-cross-compile
-// TODO: The above accidentally also ignores this test against rustc even when are are not cross-compiling.
 
 extern crate dep;