cmake: fixed to not install into '/usr/usr' (Issue #24)

http://dev.opensde.net/issues/24

develop/cmake/cmake.conf

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../cmake/cmake.conf
-# Copyright (C) 2009 The OpenSDE Project
+# Copyright (C) 2009 - 2011 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 #
 # More information can be found in the files COPYING and README.
@@ -14,3 +14,5 @@
 # --- SDE-COPYRIGHT-NOTE-END ---
 
 cleanconfopt=0
+
+confopt="--prefix=$root/$prefix"