net/nut: Fix '/var/run' world readable warning

Use /var/run/nut as statepath and set appropriate owner
and permissions on /var/run/nut in order to avoid pidfile
for nut being world-readable.

Signed-off-by: Daniel Dickinson <lede@cshore.thecshore.com>

net/nut/Makefile

@@ -506,7 +506,7 @@ CONFIGURE_ARGS += \
 	--without-freeipmi \
 	--$(if $(CONFIG_NUT_SSL),with,without)-ssl $(if $(CONFIG_NUT_SSL),--with-openssl) \
 	--without-libltdl \
-	--with-statepath=/var/run \
+	--with-statepath=/var/run/nut \
 	--with-drvpath=/lib/nut \
 	--with-user=root \
 	--with-group=root