Test fixes from the rollup

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

Author: alexcrichton

Diff for: 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!()

Diff for: 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

Diff for: src/test/run-pass/smallest-hello-world.rs

@@ -8,7 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// Smallest hello world with no runtime
+// ignore-android
+
+// Smallest "hello world" with a libc runtime
 
 #![no_std]