/system/bin/auditctl is executed by init to set the kernel audit
throttling rate limit. Grant the rules necessary for this to happen.
Test: compiles and boots
Test: Perform an operation which generates lots of SELinux denials,
and count how many occur before and after the time period.
Bug: 118815957
Change-Id: Id9df65497d1172ab7c2e84ff6a43722f11c61620