block: Add Simple IO scheduler

Conflicts:
	block/Kconfig.iosched
	block/Makefile

	modified:   arch/arm/configs/t0_04_defconfig added sio/vr io sched, commented out all except noop, commented out all governors except interactive & conservative, added adaptive governor & more minute changes
	modified:   block/Kconfig.iosched sio scheduler
	modified:   block/Makefile sio scheduler
	new file:   block/sio-iosched.c sio scheduler
	modified:   build.sh initial commit
	modified:   releasetools/zip/META-INF/com/google/android/updater-script attempt at fixing up status 6 error in recovery
boot: Enable XZ compression
xz: tweaking kernel compression
	modified:   arch/arm/configs/t0_04_defconfig added XZ kernel compression
	modified:   block/Kconfig.iosched added SIO I/O scheduler
	modified:   block/Makefile added SIO I/O scheduler
	modified:   build.sh uncommented out clean up script