squashfs-tools: improved to use a preconf hook to change into the right source directory

filesystem/squashfs-tools/squashfs-tools.conf

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../squashfs-tools/squashfs-tools.conf
-# Copyright (C) 2008 The OpenSDE Project
+# Copyright (C) 2008 - 2010 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 #
 # More information can be found in the files COPYING and README.
@@ -13,8 +13,8 @@
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
 
-srcdir="squashfs$ver/squashfs-tools"
 makeinstopt=
 
+hook_add preconf 2 'cd squashfs-tools'
 hook_add postmake 5 "install {mk,un}squashfs $root$sbindir/"