package/mesa3d: fix xlib_libxshmfence dependency
Fixes
http://autobuild.buildroot.net/results/6b2/
6b214f1013d2def0b7ff33af3115147f47afd7a1/
http://autobuild.buildroot.net/results/8b8/
8b8251235f6b08ae2275659f7af241d6d43df074/
http://autobuild.buildroot.net/results/468/
4681b76cbca66a267741df80719a4c2e032c6b00/
http://autobuild.buildroot.net/results/90f/
90fee90a4a8f6bb35be94ee437f8f7c1f0cbb5d9/
http://autobuild.buildroot.net/results/1b8/
1b862e22f9d1dfaf9b8d3a998061a83012302b05/
http://autobuild.buildroot.net/results/ebe/
ebe3e12887c89649ad3de0045846836957d83396/
http://autobuild.buildroot.net/results/b7b/
b7b300cc056bdc51a0570be2f250b806e306999e/
http://autobuild.buildroot.net/results/c39/
c3960a95741341114ced8907de09b6a266999184/
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>