Patch few bugs in distutils.ext.

This version seems able to install at list the empty package

distutils.ext/obidistutils/serenity/rerun.py

@@ -37,10 +37,12 @@ def rerun_with_anothe_python(path, minversion='3.4',maxversion=None, fork=False)
         log.info('External process ended')
         sys.exit(0)
     else:
+        log.info('Install script restarting...')
         os.execv(path,list(args))
 
 def enforce_good_python(minversion='3.4',maxversion=None, fork=False):
     if is_python_version(minversion=minversion,maxversion=maxversion):
+        log.info('You are running the good python')
         return True
     
     goodpython = lookfor_good_python(minversion,maxversion)