File import-missing-scons.patch of Package gpick

diff --git a/SConscript b/SConscript
index 79b3b30..20fb81b 100644
--- a/SConscript
+++ b/SConscript
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 # coding: utf-8
-import os, string, sys, shutil, math
+import os, string, sys, shutil, math, SCons.Util
 from tools import *
 
 env = GpickEnvironment(ENV = os.environ)