Mount debugfs earlier regardless build variant

ag/835596 can be reverted after this CL is merged.

BUG:26455292
Change-Id: I453b0f1d08d822f8cd2d4d33f1c1b21f0d7f543a
diff --git a/rootdir/init.rc b/rootdir/init.rc
index e218307..70a75bd 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -18,6 +18,8 @@
     # Set the security context of /adb_keys if present.
     restorecon /adb_keys
 
+    mount debugfs /sys/kernel/debug /sys/kernel/debug mode=755
+
     start ueventd
 
 on init