Slplited python compat file for python 2.x and 3.x

tests/util/py3xfunctions.py

@@ -0,0 +1,14 @@
+def b(s):
+    return bytes(s, "UTF8")
+
+def l(n):
+    return n
+
+def unicode_(s):
+    return s
+
+unicode = str
+unichr = chr
+long = int
+unichr = chr
+buffer = b