package/filemq: bump to the latest master

This bump include a patch that fixes a build issue with gcc >= 7.1.

Fixes:
http://autobuild.buildroot.net/results/434/43452430edf44cbcef6ea3a5ab80ac0ff406208f



Signed-off-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>