Update build_wheels.py for aarch64 support

[esnvidia]

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The attached file here fixes an issue using HuggingFace datasets requiring soundfile on aarch64.

I compiled on this branch (bastibe/aarchh64-build) using linux_build.sh on Grace Hopper, which requires aarch64. This generated libsndfile.so which I renamed to libsndfile_aarch64.so to match the others

Then, in this line I added 'aarch64' and built the whl as suggested python setup.py bdist_wheel followed by installing the whl with pip install dist/soundfile-0.12.1-py2.py3-none-manylinux_2_17_aarch64.whl

This file should just be added to the repo along with the others.