go_vncdriver was installed without OpenGL support

[xiahouzuoxin]

When run demo example,

universe-wyFLTW-0 | [init] [2016-12-10 11:06:54,947] init detected end of child process 20 with exit code 0, not killed by signal
Traceback (most recent call last):
  File "test_universe.py", line 11, in <module>
    env.render()
[2016-12-10 19:06:54,992] [0:localhost:5900] Waiting on rewarder: Could not establish rewarder TCP connection. Retry in 1s (slept 0s/7s): connection was closed uncleanly (WebSocket connection upgrade failed (502 - BadGateway))
  File "/home/hzxiahouzuoxin/miniconda2/lib/python2.7/site-packages/gym/core.py", line 192, in render
    return self._render(mode=mode, close=close)
  File "/home/hzxiahouzuoxin/miniconda2/lib/python2.7/site-packages/gym/core.py", line 342, in _render
    return self.env.render(mode, close)
  File "/home/hzxiahouzuoxin/miniconda2/lib/python2.7/site-packages/gym/core.py", line 192, in render
    return self._render(mode=mode, close=close)
  File "/home/hzxiahouzuoxin/Prjs/universe/universe/wrappers/render.py", line 49, in _render
    return self.env.render(mode=mode, *args, **kwargs)
  File "/home/hzxiahouzuoxin/miniconda2/lib/python2.7/site-packages/gym/core.py", line 192, in render
    return self._render(mode=mode, close=close)
  File "/home/hzxiahouzuoxin/miniconda2/lib/python2.7/site-packages/gym/core.py", line 342, in _render
    return self.env.render(mode, close)
  File "/home/hzxiahouzuoxin/miniconda2/lib/python2.7/site-packages/gym/core.py", line 192, in render
    return self._render(mode=mode, close=close)
  File "/home/hzxiahouzuoxin/Prjs/universe/universe/envs/vnc_env.py", line 533, in _render
    self.vnc_session.render(self.connection_names[0])
go_vncdriver.Error: /tmp/pip-build-kAJF1h/go-vncdriver/.build/src/github.com/openai/go-vncdriver/main.go:387: go_vncdriver was installed without OpenGL support. See https://github.com/openai/go-vncdriver for details on how debug.

[xiahouzuoxin]

I found that problem at https://github.com/openai/go-vncdriver, and solved it.