Use the new xorg-sdk build type instead of building a complete Xserver,
to compile our drivers against.
Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Add a github workflow that builds the Xservers on Linux and also
runs build-test of several common drivers against xorg sdk.
Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>