package/gerbera: bump to version 1.3.4

Fix build with libupnp18 1.8.5 through
https://github.com/gerbera/gerbera/commit/1476d7a90673a870091044fcc0307f5bcaeb24be

Fixes:
 - http://autobuild.buildroot.org/results/e77839fad16caa5798cacb36a5a48b3dbb822ea6



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>