package/gerbera: fix pidfile name in start-stop-script

`NAME` is not set resulting in a pidfile without a basename:
`/var/run/.pid`. Use the correct variable `DAEMON` instead.

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gerbera/S99gerbera

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 DAEMON="gerbera"
-PIDFILE="/var/run/$NAME.pid"
+PIDFILE="/var/run/$DAEMON.pid"
 
 GERBERA_ARGS="-c /etc/gerbera/config.xml -l /var/log/gerbera.log"