Add sysprop for init's perf_event_open LSM hook check

Written exclusively by init. Made it readable by shell for CTS, and for
easier platform debugging.

Bug: 137092007
Change-Id: Ia5b056117502c272bc7169661069d0c8020695e2
diff --git a/private/property_contexts b/private/property_contexts
index 625bf37..2db46a0 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -23,6 +23,7 @@
 ro.hw.                  u:object_r:system_prop:s0
 sys.                    u:object_r:system_prop:s0
 sys.init.userspace_reboot   u:object_r:userspace_reboot_prop:s0
+sys.init.perf_lsm_hooks u:object_r:init_perf_lsm_hooks_prop:s0
 sys.cppreopt            u:object_r:cppreopt_prop:s0
 sys.linker.             u:object_r:linker_prop:s0
 sys.lpdumpd             u:object_r:lpdumpd_prop:s0