libnetfilter-conntrack: add from OE-Classic and update

* Update to version 1.0.2
* Add SUMMARY and tweak DESCRIPTION
* Add HOMEPAGE
* Add dependency on libmnl

Based on a patch by Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>