labor firmware: add avm's revision to image name

git-svn-id: file:///var/svn/freetz/trunk@10233 149334a1-2f27-0410-a3b9-fc62619ac1e6
git:
 * bump version to 1.8.1.5


git-svn-id: file:///var/svn/freetz/trunk@10234 149334a1-2f27-0410-a3b9-fc62619ac1e6
pyload:
 * bump revision to c5f21698c3


git-svn-id: file:///var/svn/freetz/trunk@10235 149334a1-2f27-0410-a3b9-fc62619ac1e6