Log Message:
Updated py-cffi to 1.8.2.

Tests don't run on MPROTECT enabled systems, and I haven't found
the magic to fix that.

CFFI 1.8.2 has been released.  (Versions 1.8 and 1.8.1 are only inside
PyPy 5.4.0 and 5.4.1, which have been released recently.)

Two main changes:

* On CPython 3.x, the C extension modules generated by cffi (not cffi
itself!) are now using CPython's official "limited C API".  This means
that the same compiled .so/.dll should work without recompilation on
any version >= 3.2.  The name produced by distutils is still
version-specific.  To get the version-independent name, you can rename
it manually to ``NAME.abi3.so``, or use the very recent setuptools 26.

* ffi.from_buffer() can now be used on byte strings, getting the
``char *`` address of the C string directly.  This was not allowed
because PyPy couldn't support it---we can make the string non-movable,
but the blocker was that the strings in PyPy are not zero-terminated!
So from PyPy 5.4 all strings are allocated with space for one extra
character---an extremely minor overhead---and we write a zero at the
end when ffi.from_buffer() is called.  Similarly, when we call
``lib.func("abc")``, PyPy would always make a copy of the string
because the original wasn't zero-terminated; now neither PyPy nor
CPython need to duplicate the string.

1.7.0

cffi 1.7 has been released.  (It corresponds to the version that was
released with PyPy 5.3.)

In the main news, the following are now supported:

* ffi.gc(p, None)
* bool(ffi.cast("primitive type", x))
* ffi.from_buffer(bytearray-object)
* C++: "_Bool undefined" fixed
* help(lib), help(lib.myfunc)