udev: allow rule readers runtime rules access

Upstream a change from Gentoo to allow readers of udev rules runtime dir
access to read udev rules in /run/udev/rules.d.

Signed-off-by: Kenton Groombridge <concord@gentoo.org>

Author: 0xC0ncord

policy/modules/system/udev.if

@@ -213,6 +213,8 @@ interface(`udev_read_rules_files',`
 		type udev_rules_t;
 	')
 
+	files_search_etc($1) # /etc/udev/rules.d
+	udev_search_runtime($1) # /run/udev/rules.d
 	read_files_pattern($1, udev_rules_t, udev_rules_t)
 ')