Move cros_start_vm and cros_stop_vm to src/scripts.

cros_start_vm and cros_stop_vm are only wrapper around
src/scripts/lib/cros_vm_lib.sh that live in src/platform/dev/host. They
are not installed on the chroot and are always called from the symlink
in src/scripts/bin. We don't need to have them live in
src/platform/dev/host.

BUG=None
TEST=manual: Can start and stop a vm from src/scripts/bin.
TEST=trybot run on *-generic-paladin.

Change-Id: I7290cd1a4030e51d89c2c64e84bb2cb39812877f
Reviewed-on: https://chromium-review.googlesource.com/274123
Trybot-Ready: Bertrand Simonnet <bsimonnet@chromium.org>
Tested-by: Bertrand Simonnet <bsimonnet@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Sheng-liang Song <ssl@chromium.org>
4 files changed