gphoto2 2.5.6: disable searching in host /usr for popt
gphoto2 2.5.6: disable searching in host /usr for popt

Signed-off-by: Koen Kooi <42e3d96910f922bdd7dd1805fe3f8aff634f391d@dominion.thruhere.net>

kraj/meta-photography,koenkooi/meta-photography