Update hooks: migrate amd64-generic and x86-generic to freon

BUG=chromium:532719
TEST=run_chroot_version_hooks
CQ-DEPEND=CL:320117

Change-Id: I3621039a963bbf8b4a68b1b8673d2811e40a0fad
Reviewed-on: https://chromium-review.googlesource.com/320118
Commit-Ready: Haixia Shi <hshi@chromium.org>
Tested-by: Haixia Shi <hshi@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed