[Buildroot] [PATCH 1/1] package/paho-mqtt-c: security bump to version 1.3.9

[Peter Korsgaard]

>>>>> "Fabrice" == Fabrice Fontaine <fontaine.fabrice at gmail.com> writes:

 > Old security issue not fixed:
 > https://github.com/eclipse/paho.mqtt.c/issues/1084

 > https://github.com/eclipse/paho.mqtt.c/milestone/16?closed=1

 > Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>

Committed to 2021.02.x, thanks.

-- 
Bye, Peter Korsgaard