build: sync glusterfs.spec.in with Fedora glusterfs.spec

(this is the release-3.4 branch)

* add necessary requires
* add -cli subpackage
* fix other minor differences with Fedora glusterfs.spec

Change-Id: I86eb38a1cc52cdcd25f62c75fae28dbd9539195e
BUG: 819130
Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>
Reviewed-on: http://review.gluster.org/5521
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>