bootstat: Hook up bootstat to record the boot complete signal and log
boot events in the LOCAL_INIT_RC file, bootstat.rc.

This change also creates the /data/misc/bootstat dir during the
filesystem creation block in init.rc.

Bug: 21724738
Change-Id: I2ad6913c0235d5f926c6ef8b3c65d650159c6ed7
diff --git a/bootstat/bootstat.rc b/bootstat/bootstat.rc
new file mode 100644
index 0000000..2c37dd2
--- /dev/null
+++ b/bootstat/bootstat.rc
@@ -0,0 +1,14 @@
+# This file is the LOCAL_INIT_RC file for the bootstat command.
+
+on post-fs-data
+    mkdir /data/misc/bootstat 0700 root root
+
+# This marker, boot animation stopped, is considered the point at which the
+# the user may interact with the device, so it is a good proxy for the boot
+# complete signal.
+on property:init.svc.bootanim=stopped
+    # Record boot_complete timing event.
+    exec - root root -- /system/bin/bootstat -r boot_complete
+
+    # Log all boot events.
+    exec - root root -- /system/bin/bootstat -l