dev-python/cffsubr: initial import

Signed-off-by: Alessandro Barbieri <lssndrbarbieri@gmail.com>

dev-python/cffsubr/files/cffsubr-0.2.8-fix-setup-py.patch

@@ -0,0 +1,18 @@
+--- a/setup.py
++++ b//setup.py
+@@ -135,7 +135,6 @@
+     platforms=["posix", "nt"],
+     package_dir={"": "src"},
+     packages=find_packages("src"),
+-    ext_modules=[tx],
+     zip_safe=False,
+     cmdclass=cmdclass,
+     install_requires=[
+@@ -145,7 +144,6 @@
+     setup_requires=[
+         "setuptools_scm",
+         # finds all git tracked files including submodules when making sdist MANIFEST
+-        "setuptools-git-ls-files",
+     ],
+     extras_require={"testing": ["pytest"]},
+     python_requires=">=3.6",