package/minidlna: use /run for PIDFile

Fixes:

PIDFile= references a path below legacy directory /var/run/, updating
/var/run/minidlna.pid → /run/minidlna.pid; please update the unit file
accordingly.

Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/minidlna/minidlnad.service

@@ -5,7 +5,7 @@ After=network.target
 [Service]
 Type=forking
 ExecStart=/usr/sbin/minidlnad
-PIDFile=/var/run/minidlna/minidlna.pid
+PIDFile=/run/minidlna/minidlna.pid
 
 [Install]
 WantedBy=multi-user.target