mosquitto: Add missing 'mosquitto' static group id

The mosquitto user gets added to the mosquitto group in the
recipe [1], so make sure the mosquitto static group id exists
and that the mosquitto user is a part of it.

[1] https://git.openembedded.org/meta-openembedded/tree/meta-networking/recipes-connectivity/mosquitto/mosquitto_2.1.2.bb#n94

Signed-off-by: Aleksandar Nikolic <aleksandar.nikolic22@pm.me>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-networking/files/static-group-meta-networking

@@ -13,3 +13,4 @@ lldpd:x:642:
 opensaf:x:643:
 radiusd:x:651:
 ntp:x:653:
+mosquitto:x:657:

meta-networking/files/static-passwd-meta-networking

@@ -16,4 +16,4 @@ ntp:x:653:ntp::/:/bin/nologin
 nm-fortisslvpn:x:654:nogroup::/:/bin/nologin
 nm-openvpn:x:655:nogroup::/:/bin/nologin
 squid:x:656:nogroup::/:/bin/nologin
-mosquitto:x:657:nogroup::/:/bin/nologin
+mosquitto:x:657:mosquitto::/:/bin/nologin