* mesa: re-writen to new meson build system
* xorg-server: Remove unneeded mesa dependency
* glx: provide the virtual GLX package
* Convert most "mesa" dependencies to use virtual gl and glx dependencies
* mesa: Switch to always building from the git repo instead of a tarball
* Use gl and glx version ranges instead of exact versions
* glx: provide a default package
* add auto to swr variant
* Revert "add auto to swr variant"
This reverts commit 2e7cd8a8ac.
* update mesa package to version 19.0
* set +glx by default only when running on linux
* fix style issues in geant4 package
* remove virtual package "egl"
9f848205e4