Allow to build with the PyPI package "clang" instead of "libclang". 1. It seems to be maintained. 2. In the FreeBSD base system there is no pre-built libclang.so. If you need this library you have to install llvm from ports additionally. 2. On FreeBSD there is no pre-built wheel "libclang" with a packaged libclang.so.

# PyMuPDFd

This wheel contains [MuPDF](https://mupdf.readthedocs.io/) build-time files
that were used to build [PyMuPDF](https://pymupdf.readthedocs.io/).