[pypy-issue] Issue #2893: CPython getargs.c updated for Python 3.6 (pypy/pypy)

[John Aldis]

New issue 2893: CPython getargs.c updated for Python 3.6
https://bitbucket.org/pypy/pypy/issues/2893/cpython-getargsc-updated-for-python-36

John Aldis:

`pypy`'s `getargs.c` is a copy of the same file from CPython, but this file has been updated for 3.6, which leads to test failures. For example, the occurrences of `PyExc_RuntimeError` have been replaced with `PyExc_SystemError`, `PyExc_TypeError` etc. See https://github.com/python/cpython/blob/3.6/Python/getargs.c and compare with https://bitbucket.org/pypy/pypy/src/default/pypy/module/cpyext/src/getargs.c