libaudit: limit to 5 selinux denials per sec

watchdog is triggering on shamu. This may be due to an excessive
number of SELinux denials. Drop the limit from 20/sec to 5/sec.

Bug: 19950451
Bug: 19949988
Change-Id: I979f11e17c241ff2ebda4dec9694ef441dc5d0ed
diff --git a/logd/libaudit.c b/logd/libaudit.c
index d00d579..cf76305 100644
--- a/logd/libaudit.c
+++ b/logd/libaudit.c
@@ -177,7 +177,7 @@
      */
     status.pid = pid;
     status.mask = AUDIT_STATUS_PID | AUDIT_STATUS_RATE_LIMIT;
-    status.rate_limit = 20; // audit entries per second
+    status.rate_limit = 5; // audit entries per second
 
     /* Let the kernel know this pid will be registering for audit events */
     rc = audit_send(fd, AUDIT_SET, &status, sizeof(status));