llkd: add live-lock daemon

Introduce a standalone live-lock daemon (llkd), to catch kernel
or native user space deadlocks and take mitigating actions.

Test: llkd_unit_test
Bug: 33808187
Bug: 72838192
Change-Id: If869ecd06e5ce7b04bba1dafd0a77971b71aa517
diff --git a/private/compat/27.0/27.0.ignore.cil b/private/compat/27.0/27.0.ignore.cil
index 86aa890..d2ab474 100644
--- a/private/compat/27.0/27.0.ignore.cil
+++ b/private/compat/27.0/27.0.ignore.cil
@@ -54,6 +54,9 @@
     incident_helper
     incident_helper_exec
     last_boot_reason_prop
+    llkd
+    llkd_exec
+    llkd_tmpfs
     lowpan_device
     lowpan_prop
     lowpan_service