.gitlab-ci.yml: Remove non supported distros
We do not actually support them: current gcc6.3 version doesnt compile the stage1-gcc currently in definitions (5.3)
Opened definitions#8 (closed) to track this
We do not actually support them: current gcc6.3 version doesnt compile the stage1-gcc currently in definitions (5.3)
Opened definitions#8 (closed) to track this