libcapi:
 * bump version to avm-(7390|7270).05.50, i.e. to the version distributed by AVM together with (7390|7270).05.50 opensource package
 * refs #706

Note: doesn't solve chan_capi problems (as well as USE_OWN_LIBCAPI=yes), chan_capi still doesn't work.


git-svn-id: file:///var/svn/freetz/trunk@10717 149334a1-2f27-0410-a3b9-fc62619ac1e6