graphics/pygts: convert to autoplist

• convert to autoplist
• limit python version to 2.x

> Configuring for pygts-0.3.1_5

Traceback (most recent call last):

File "<string>", line 1, in <module>
File "setup.py", line 60
  raise RuntimeError, result[0]
                    ^

SyntaxError: invalid syntax

• Error code 1