glob.glob() is not sorted, despite using shell-style wildcards, and the
documentation does not mention this: https://bugs.python.org/issue21748

Recently, it does start mentioning "Whether or not the results are
sorted depends on the file system." which does not really get to the
heart of the matter...

This is causing fuzz too.

The current way this works is chaos since the tool might return files in
any order and thus shuffle around the order of embedded files. This
results in big diffs that cannot be easily reviewed.

Also regenerate the data according to the, going forward, canonical
ordering algorithm.

We added the _pathlib module to work around defeciencies in python 3.5's
implementation, since we now rely on 3.6 lets drop this

Subprojects that use the CMake PCH feature will cause
compilation/linker errors. The CMake PCH support
should thus be disabled until this can be properly
translated to meson.