aufs: add patch to increase depth limit of lockdep

Note:

This is a workaround for now and the whole lockdep issue needs some more
research!

filesystem/aufs/aufs-lockdep.diff

@@ -0,0 +1,38 @@
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: package/.../aufs/aufs-lockdep.diff
+# Copyright (C) 2013 The OpenSDE Project
+#
+# More information can be found in the files COPYING and README.
+#
+# This patch file is dual-licensed. It is available under the license the
+# patched project is licensed under, as long as it is an OpenSource license
+# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
+# of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
+index 00e4637..ec95456 100644
+--- a/include/linux/lockdep.h
++++ b/include/linux/lockdep.h
+@@ -29,7 +29,7 @@ extern int lock_stat;
+  */
+ #define XXX_LOCK_USAGE_STATES		(1+3*4)
+ 
+-#define MAX_LOCKDEP_SUBCLASSES		8UL
++#define MAX_LOCKDEP_SUBCLASSES		(8UL + 4)
+ 
+ /*
+  * NR_LOCKDEP_CACHING_CLASSES ... Number of classes
+@@ -203,7 +203,7 @@ struct lock_chain {
+ 	u64				chain_key;
+ };
+ 
+-#define MAX_LOCKDEP_KEYS_BITS		13
++#define MAX_LOCKDEP_KEYS_BITS		(13 + 4)
+ /*
+  * Subtract one because we offset hlock->class_idx by 1 in order
+  * to make 0 mean no class. This avoids overflowing the class_idx