Test fixes from the rollup

Closes rust-lang#13546 (workcache: Don't assume gcc exists on all platforms)
Closes rust-lang#13545 (std: Remove pub use globs)
Closes rust-lang#13530 (test: Un-ignore smallest-hello-world.rs)
Closes rust-lang#13529 (std: Un-ignore some float tests on windows)
Closes rust-lang#13528 (green: Add a helper macro for booting libgreen)
Closes rust-lang#13526 (Remove RUST_LOG="::help" from the docs)
Closes rust-lang#13524 (dist: Make Windows installer uninstall first. Closes rust-lang#9563)
Closes rust-lang#13521 (Change AUTHORS section in the man pages)
Closes rust-lang#13519 (Update GitHub's Rust projects page.)
Closes rust-lang#13518 (mk: Change windows to install from stage2)
Closes rust-lang#13516 (liburl doc: insert missing hyphen)
Closes rust-lang#13514 (rustdoc: Better sorting criteria for searching.)
Closes rust-lang#13512 (native: Fix a race in select())
Closes rust-lang#13506 (Use the unsigned integer types for bitwise intrinsics.)
Closes rust-lang#13502 (Add a default impl for Set::is_superset)

Author: alexcrichton

src/libgreen/sched.rs

@@ -1035,10 +1035,10 @@ mod test {
 
     fn sched_id() -> uint {
         let mut task = Local::borrow(None::<Task>);
-        match task.get().maybe_take_runtime::<GreenTask>() {
+        match task.maybe_take_runtime::<GreenTask>() {
             Some(green) => {
                 let ret = green.sched.get_ref().sched_id();
-                task.get().put_runtime(green);
+                task.put_runtime(green);
                 return ret;
             }
             None => fail!()

src/librustuv/lib.rs

@@ -462,7 +462,7 @@ fn local_loop() -> &'static mut uvio::UvIoFactory {
     unsafe {
         cast::transmute({
             let mut task = Local::borrow(None::<Task>);
-            let mut io = task.get().local_io().unwrap();
+            let mut io = task.local_io().unwrap();
             let (_vtable, uvio): (uint, &'static mut uvio::UvIoFactory) =
                 cast::transmute(io.get());
             uvio