package/gerbera: needs xpath in pugixml

Fixes:
 - http://autobuild.buildroot.org/results/0fcd0ce167c04f788bf1b9414ae5e7677691c7cf

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
1 file changed