catkin-tools doesn't work in brickstrap shell

[moriarty]

catkin_make has a new replacement catkin build

http://catkin-tools.readthedocs.org/en/latest/index.html

inside of a brickstrap shell, catkin build fails with the following error:

Exception in thread build-1:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner
    self.run()
  File "/usr/local/lib/python2.7/dist-packages/catkin_tools/verbs/catkin_build/executor.py", line 146, in run
    for line in run_command(command.cmd, cwd=command.location):
  File "/usr/local/lib/python2.7/dist-packages/catkin_tools/runner/run_unix.py", line 40, in run_command
    master, slave = pty.openpty()
  File "/usr/lib/python2.7/pty.py", line 29, in openpty
    master_fd, slave_name = _open_terminal()
  File "/usr/lib/python2.7/pty.py", line 70, in _open_terminal
    raise os.error, 'out of pty devices'
OSError: out of pty devices

catkin_make and catkin_make_isolated still work fine, so this likely a won't fix.