base-files: ignore failure of stopping services on removal

Packages that do a killall <cmd> with the same name as the init script
will fail the prerm step when the service isn't running. Do make them
removable without having to restart the service, ignore the return code.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Acked-by: Jo-Philipp Wich <jo@mein.io>

package/base-files/files/lib/functions.sh

@@ -178,7 +178,7 @@ default_prerm() {
 			if [ "$PKG_UPGRADE" != "1" ]; then
 				"$i" disable
 			fi
-			"$i" stop
+			"$i" stop || /bin/true
 		fi
 	done
 }