ovirt.te: snmpd_t add device_t and ovirt_t

This patch adds:

- snmpd_t device_t:sock_file write
- snmpd_t ovirt_t:unix_dgram_socket sendto

Change-Id: Ieb9cc8140397af95fdbcc8e5a4b55132ed9db80b
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>