Libpipewire is a pipewire library wrapper needed to build and run Firefox with
Pipewire support on Linux (
https://pipewire.org/).
Pipewire directory stores headers of pipewire-0.3 and spa-0.2 needed for build only.
The version.h file is generated by the pipewire library build from the template file `src/pipe
wire/version.h.in`.
