Create /data/system/heapdump for system_server

Bug: 20073185
Change-Id: I6fd83d33da33d048fdd6b07fa1f675ecb4f4eb2c
diff --git a/rootdir/init.rc b/rootdir/init.rc
index cda79ce..0edb984 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -311,6 +311,7 @@
     mkdir /data/media 0770 media_rw media_rw
     mkdir /data/ss 0700 system system
     mkdir /data/system 0775 system system
+    mkdir /data/system/heapdump 0700 system system
     mkdir /data/user 0711 system system
 
     # Reload policy from /data/security if present.