collectd: add recipe for 5.2.2

Based on initial version by Koen Kooi <koen@beagleboard.org>. Initscript
borrowed from Debian with some tweaks.

Note that since collectd uses libltdl, building this successfully
required OE-Core commit db84eaf851b22b262d9dc48eb55bd5224a00fdd2 or else
you get an error about "config/compile" being missing.

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