Record ASSETS_FOUND as relative paths.
Record ASSETS_FOUND as relative paths.

The archive and deploy plugs are using relative paths when it comes to the asset regex.  So trimmed the repo_root off the full paths.

Change-Id: Ic9bd5a8089b60675f01a26be416fe8478d7da4be
WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit