Revert "Use AOSP's prebuilts/tools for now"

This reverts commit cbb7893aa76a95178d27f03dc91e17dbfc721293.
Revert "Track our custom host TC for graphite support"

This reverts commit 8bb85e4b0412b1fe0be16feba9d84ea0d3a6ddc1.
Manifest: Update for V4
Merge remote-tracking branch 'upstream/kitkat-remix' into kitkat-remix

Conflicts:
	default.xml