Patch few bugs in distutils.ext.

This version seems able to install at list the empty package

distutils.ext/obidistutils/serenity/util.py

@@ -0,0 +1,27 @@
+'''
+Created on 2 oct. 2014
+
+@author: coissac
+'''
+
+import sys 
+import tempfile
+
+
+from obidistutils.serenity.globals import tmpdir         # @UnusedImport
+from obidistutils.serenity.globals import saved_args     # @UnusedImport
+
+def get_serenity_dir():
+    global tmpdir
+
+    if not tmpdir:
+        tmpdir.append(tempfile.mkdtemp())
+    return tmpdir[0]
+        
+def save_argv():
+    global saved_args
+
+    del saved_args[:]
+    saved_args.extend(list(sys.argv))
+
+