glusterfs.spec.in: bad %define _sharedstatedir for rhel5

Change-Id: If2ca7052dfce9fada42180f1d469316fcde5adcb
BUG: 1003184
Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>
Reviewed-on: http://review.gluster.org/6105
Reviewed-by: Justin Clift <jclift@redhat.com>
Tested-by: Justin Clift <jclift@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>