package/paho-mqtt-c: bump to version 1.3.6
Update LICENSE hash, EDL version has been fixed with
https://github.com/eclipse/paho.mqtt.c/commit/34ec96cac554c4ae1527b92433730233f1bdca40
https://github.com/eclipse/paho.mqtt.c/milestone/11?closed=1
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>