add ext_modules

 * add a comment suggested by @akx (2024/01/30)
Co-authored-by: Aarni Koskela <akx@iki.fi>

setup.py

@@ -5,7 +5,7 @@
 import glob
 import os
 
-from setuptools import find_packages, setup
+from setuptools import Extension, find_packages, setup
 
 libs = list(glob.glob("./bitsandbytes/libbitsandbytes*.so"))
 libs += list(glob.glob("./bitsandbytes/libbitsandbytes*.dll"))
@@ -35,6 +35,9 @@ setup(
     },
     long_description=read("README.md"),
     long_description_content_type="text/markdown",
+    # HACK: pretend we have a native extension module so the wheel is tagged
+    #       correctly with a platform tag (e.g. `-linux_x86_64.whl`).
+    ext_modules=[Extension("bitsandbytes", sources=[], language="c")],
     classifiers=[
         "Development Status :: 4 - Beta",
         "Topic :: Scientific/Engineering :: Artificial Intelligence",