gitlab containers are broken

[Richard Henderson]

Something has gone wrong with the building of the containers
in gitlab, because *all* off them are installing Alpine Linux.

https://gitlab.com/rth7680/qemu/-/jobs/1006336396#L155

I presume that IMAGE is not actually being passed through, and alpine.docker is
lexicographically first.

I have a strong suspicion that it's related to local "make docker" breakage, in
that e.g.

$ make docker-test-build@fedora-i386-cross
/usr/bin/python3 -B /home/rth/qemu/qemu/meson/meson.py introspect --targets
--tests --benchmarks | /usr/bin/python3 -B scripts/mtest2make.py > 
Makefile.mtest
  GIT     ui/keycodemapdb tests/fp/berkeley-testfloat-3
tests/fp/berkeley-softfloat-3 meson dtc capstone slirp
  GIT     ui/keycodemapdb tests/fp/berkeley-testfloat-3
tests/fp/berkeley-softfloat-3 meson dtc capstone slirp
make: *** No rule to make target 'docker-test-build@fedora-i386-cross'.  Stop.

which certainly looks like the docker-TEST@IMAGE format documented.


r~