update_aosp.sh: move to contrib

This code isn't supported by the build team, so move it to contrib/.

BUG=None
TEST=None

Change-Id: I254772a29fa7896c005269cf019abd28fb1fae22
Reviewed-on: https://chromium-review.googlesource.com/1178338
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Luis Hector Chavez <lhchavez@chromium.org>
1 file changed