tools/gitlog2changelog.py.in: trace absence of "unicode" type in some python bundles

Signed-off-by: Jim Klimov <jimklimov+nut@gmail.com>

Author: jimklimov

tools/gitlog2changelog.py.in

@@ -12,8 +12,15 @@ import subprocess
 
 # Python 3 compatibility hack
 try:
+    try:
+        import unicode
+    except:
+        # Maybe built-in?
+        pass
     unicode('')
-except NameError:
+except NameError as ex:
+    #DEBUG# sys.stderr.write("Using 'str' as 'unicode': %s\n" % str(ex))
+    #DEBUG# sys.stderr.flush()
     unicode = str
 
 try: