Use BUILD.gn to install the touch updater scripts

As part of build, install the touch updater scripts instead
of doing it in the ebuild. For scripts that are enabled by
USE flags, depend on the USE flag to install them. For all
other scripts, always install.

BUG=b:314407542
TEST=CQ passes
TEST=Enabled all use flags and validated that all files were installed.

Change-Id: I3b9da77cb9ac791143cfc8398d97863761df5a99
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/touch_updater/+/5319413
Commit-Queue: Henry Barnor <hbarnor@chromium.org>
Tested-by: Henry Barnor <hbarnor@chromium.org>
Reviewed-by: William Mahon <wmahon@google.com>
Reviewed-by: Kenneth Albanowski <kenalba@google.com>
1 file changed