haveged: Add recipe for haveged entropy daemon v1.9.1

As we are building software for headless embedded devices, we don't want to rely on the
entropy generated by default linux kernel mechanisms. Haveged seems to be a good
solution in providing more entropy for headless devices.

Upstream-Status: Pending

Signed-off-by: Sven Ebenfeld <sven.ebenfeld@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>