glusterfs.spec: Add missing files in %files section

Thanks to Niels for all the help in finding RCA.

Change-Id: I5678c53a5c04de18ccd676fbaf5bf8b0c77c9c14
BUG: 1080970
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/7645
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>