scripts: dl_cleanup.py: properly detect file names with <date>-<githash> version string

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36729 3c298f89-4303-0410-b956-a3cf2f4a3e73
uci: update to git head (#13348, http://luci.subsignal.org/trac/ticket/572)

  - fixes overwriting list options with single-item lists in lua binding

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36730 3c298f89-4303-0410-b956-a3cf2f4a3e73