init.rc: Create a small tmpfs on /asec so we can create mountpoints

Signed-off-by: San Mehat <san@google.com>
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 4aa02c5..b4689e6 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -24,11 +24,14 @@
     mkdir /system
     mkdir /data 0771 system system
     mkdir /cache 0770 system cache
-    mkdir /asec  0500 system system
     mkdir /config 0500 root root
     mkdir /sqlite_stmt_journals 01777 root root
     mount tmpfs tmpfs /sqlite_stmt_journals size=4m
 
+# create Android Secure External Cache mount tree
+    mkdir /asec  0500 system system
+    mount tmpfs tmpfs /asec mode=0700
+
     mount rootfs rootfs / ro remount
 
     write /proc/sys/kernel/panic_on_oops 1