test: Make manual changes to deal with the fallout from removal of

`~[T]` in test, libgetopts, compiletest, librustdoc, and libnum.

src/test/compile-fail/lint-unused-mut-variables.rs

@@ -16,6 +16,8 @@
 #[allow(deprecated_owned_vector)];
 #[deny(unused_mut)];
 
+use std::vec_ng::Vec;
+
 fn main() {
     // negative cases
     let mut a = 3; //~ ERROR: variable does not need to be mutable