Allow recovery to access kmsg for log retrieval

Bug: 18642766

Change-Id: I97d6ab0b76b69d99dcc1928232c8961437e1e68c
Signed-off-by: Patrick Tjin <pattjin@google.com>

recovery.te

@@ -50,6 +50,8 @@ recovery_only(`
   # TODO: create more specific label?
   allow recovery sysfs:file w_file_perms;
 
+  access_kmsg(recovery)
+
   # Access /dev/android_adb or /dev/usb-ffs/adb/ep0
   allow recovery adb_device:chr_file rw_file_perms;
   allow recovery functionfs:dir search;