Autodetection doesn't work, but gitlab does in fact support colour
output. Perhaps more importantly, the "Scroll to next failure" feature
essentially scans the output for red text.
The dxcompiler is only used for 64 bit builds, because no official
32 bit implementation is distributed. This might change in the future
building the compiler ourselves and using vkd3d-shader to sign the
generated shaders.
Mostly to avoid polluting other logs and artifacts, and also to avoid
recompiling crosstests over and over. Eventually the artifacts produced
at this stage should be run on native Windows.
