BUILD.gn: Add Paradetech touch firmware updater script

BUG=b:322256203
TEST=Tested on Octopus

Cq-Depend: 5364558
Change-Id: I3c43449aacd5bbee1667afa328510c3c5efe5dbb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/touch_updater/+/5369292
Tested-by: Henry Barnor <hbarnor@chromium.org>
Reviewed-by: Henry Barnor <hbarnor@chromium.org>
Commit-Queue: Henry Barnor <hbarnor@chromium.org>
1 file changed