gitlab-ci: Don't rely on $CI_PROJECT_NAME
The name of a forked repository can be changed later, in which case this would fail to refer to the main repository. Pointed out by Eric Engestrom in mesa/mesa!224 .
The name of a forked repository can be changed later, in which case this would fail to refer to the main repository. Pointed out by Eric Engestrom in mesa/mesa!224 .