supergfxctl: drop nonexistent sudo group from D-Bus policy

Arch has no sudo group, so dbus-broker rejects that policy block by name on
every bus reload: "Invalid group-name in org.supergfxctl.Daemon.conf +9:
group=\"sudo\"". The block grants nothing here; the wheel policy in the same
file is what authorises an unprivileged user.

Remove the dead block with a checked-in patch and bump pkgrel.

pkgbuilds/supergfxctl/drop-nonexistent-sudo-group.patch

@@ -0,0 +1,13 @@
+--- a/data/org.supergfxctl.Daemon.conf
++++ b/data/org.supergfxctl.Daemon.conf
+@@ -6,10 +6,6 @@
+         <allow send_destination="org.supergfxctl.Daemon"/>
+         <allow receive_sender="org.supergfxctl.Daemon"/>
+     </policy>
+-    <policy group="sudo">
+-        <allow send_destination="org.supergfxctl.Daemon"/>
+-        <allow receive_sender="org.supergfxctl.Daemon"/>
+-    </policy>
+     <policy group="users">
+         <allow send_destination="org.supergfxctl.Daemon"/>
+         <allow receive_sender="org.supergfxctl.Daemon"/>