asterisk-1.8.x,asterisk-11.x: better dependency handling for asterisk modules

Signed-off-by: Jiri Slachta <slachta@cesnet.cz>
asterisk-chan-dongle: update packages to revision 5113

Signed-off-by: Jiri Slachta <slachta@cesnet.cz>
Merge branch 'master' of http://feeds.openwrt.nanl.de/openwrt/telephony