replaces uses of extra::sort::quick_sort in keycode/scancode

[olsonjeffery]

it's a christmas miracle (fixes failing travis build against current master)

[darthdeus]

I've tried pulling in this PR but the build still fails for me with the following

➤ make
rustpkg install codegen  --cfg mac_framework
WARNING: The Rust package manager is experimental and may be unstable
note: Installed package codegen-0.0 to /Users/darth/projects/rust/game/rust-sdl2
bin/codegen keycode.rs src/sdl2/generated/
bin/codegen scancode.rs src/sdl2/generated/
rustpkg build sdl2  --cfg mac_framework
WARNING: The Rust package manager is experimental and may be unstable
/Users/darth/projects/rust/game/rust-sdl2/src/sdl2/lib.rs:1:0: 4:57 error: obsolete crate `link` attribute
/Users/darth/projects/rust/game/rust-sdl2/src/sdl2/lib.rs:1 #[link(name = "sdl2",
/Users/darth/projects/rust/game/rust-sdl2/src/sdl2/lib.rs:2        vers = "0.0.1",
/Users/darth/projects/rust/game/rust-sdl2/src/sdl2/lib.rs:3        uuid = "263e35b2-0727-11e3-b3dd-29219a890b3c",
/Users/darth/projects/rust/game/rust-sdl2/src/sdl2/lib.rs:4        url = "http://github.com/AngryLawyer/rust-sdl2")];
note: the link attribute has been superceded by the crate_id attribute, which has the format `#[crate_id = "name#version"]`
error: aborting due to previous error
task '<unnamed>' failed at 'explicit failure', /private/tmp/rust-QlWa/src/libsyntax/diagnostic.rs:102
task '<unnamed>' failed at 'receiving on a closed channel', /private/tmp/rust-QlWa/src/libstd/comm/mod.rs:749
make: *** [libsdl2.dummy] Error 65

[emberian]

Unrelated failure; simple to fix.

[emberian]

(Read the error message)