conntrack-tools: add from OE-Classic, update and tidy up

* Update to version 1.4.0 and add additional dependencies
* Handle hardcoded paths in initscripts
* Add LSB header to initscript
* Make LICENSE more specific
* Add LIC_FILES_CHKSUM
* Set SUMMARY (which sets DESCRIPTION)

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

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