Fixed install with pip, added new homebrew path

[lo-chr]

This PR changes the setup.py and adds new paths to the configuration of the library and include folders for handling the pip installation on Macs with Apple Silicon.

On Apple Silicon, Homebrew uses another path (/opt/homebrew instead of /usr/local) in comparison to the Intel Mac Version (see https://docs.brew.sh/Installation).

Without this change the build would fail on this platform, like described in #239.

I verified the change manually using pip install -e yara-python on the (locally changed) packaged version, downloaded from the PyPi repository.

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