fix mistake reported by Tim Nicholson

twister-control.py

@@ -50,7 +50,7 @@ def loadConfig():
 def saveConfig():
     configDir = os.path.dirname(configFilename)
     if not os.path.exists(configDir):
-        os.makedirs(os.path.dirname(configDir))
+        os.makedirs(configDir)
     with open(configFilename, "wb") as csvfile:
         writer = csv.writer(csvfile, delimiter='=', escapechar='\\', quoting=csv.QUOTE_NONE)
         for key, value in sorted(configOptions.items(), key=operator.itemgetter(0)):