Errors on python-2.7 FreeBSD Port

Seeing this in the FreeBSD port:
```
/usr/local/bin/python2.7 -O /tmp/tmptMgMyd.py
  File "/usr/local/lib/python2.7/site-packages/numba/tests/annotation_usecases.py", line 12
    def __init__(self, v: int):
                        ^
SyntaxError: invalid syntax
```