Fix building for MacOS 12

[pkulev]

Probably something changed in MacOS since 10.14 with default include directories and clang.

This change was tested on MacOS 12 with both M1 and intel chips.

CFFI documentation says:

Other common arguments to set_source() include library_dirs and
include_dirs; all these arguments are passed to the
standard distutils/setuptools.

I think it's also safe to pass raylib header directory on other platforms too.

Closes: #63

[electronstudio]

The GitHub Actions builds seem to be failing.

[electronstudio]

The windows failure is my fault, it was failing before. The Mac failure is caused by the PR I think. Will look at it when I have time.

[pkulev]

I temporarily disabled the change and macos still failing. I think it's because of MACOSX_DEPLOYMENT_TARGET: 10.14. The runner's version is 10.15. So probably something changed in GHA recently.

[pkulev]

Also maybe it's time to add macos 12 build too, maybe without artifacts, because on 12.3 Intel chip build fails like in linked issue.

[electronstudio]

i added a macos12 build, and it works on Github Actions, even though I haven't added your patch yet!

Seems Github Actions no longer supports 10.14. I can build on 10.15 but even that wont accept 10.14 deployment target.

[electronstudio]

It looks like the code in your patch is commented out, I guess you want to add: include_dirs=[get_the_include_path()], ?

[pkulev]

I commented it just to check whether my change failing build.

[electronstudio]

ok change is done, and it's all building (except not for macos 10.14)

[pkulev]

Ah, you did the change yourself. You should have waited for me to rebase =(