tombstoned: start immediately after /data is mounted.

Catch as many early-boot crashes as we can by starting tombstoned
immediately after /data is mounted.

Bug: http://b/139864948
Test: adb shell su 0 dmesg | grep "starting service"
Change-Id: I7f8821102191a445e87020f3efa59a2e0620d9db
diff --git a/debuggerd/tombstoned/tombstoned.rc b/debuggerd/tombstoned/tombstoned.rc
index 53ef01c..b4a1e71 100644
--- a/debuggerd/tombstoned/tombstoned.rc
+++ b/debuggerd/tombstoned/tombstoned.rc
@@ -2,10 +2,10 @@
     user tombstoned
     group system
 
-    # Don't start tombstoned until after the real /data is mounted.
-    class late_start
-
     socket tombstoned_crash seqpacket 0666 system system
     socket tombstoned_intercept seqpacket 0666 system system
     socket tombstoned_java_trace seqpacket 0666 system system
     writepid /dev/cpuset/system-background/tasks
+
+on post-fs-data
+    start tombstoned