Add a script to create the wiping tmpfs

The script mounts a tmpfs, create directories and copy files needed
for in-place wiping from factory rootfs, including some scripts, binary
executables and image files.

BUG=chromium:427793
TEST=Manual test on Paine:
     /usr/local/factory/sh/create_wiping_tmpfs.sh "/tmp/wipe_tmpfs"
CQ-DEPEND=CL:258721

Change-Id: I69c66c33b99316109d6c5f98b660f9b7e3960bca
Reviewed-on: https://chromium-review.googlesource.com/257988
Tested-by: Bowgo Tsai <bowgotsai@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Commit-Queue: Bowgo Tsai <bowgotsai@chromium.org>
1 file changed