cbuild: Propagate variables from gitlab-ci.yml into the container
It can be very convenient to let jobs influence what happens inside the container via variables in the gitlab-ci.yml files.
This avoids avoid people having to resort to the below (real example from Mesa):
FDO_DISTRIBUTION_EXEC: 'env "WINEPATH={WINEPATH}" FDO_CI_CONCURRENT=
{FDO_CI_CONCURRENT} bash .gitlab-ci/container/${CI_JOB_NAME}.sh'
Signed-off-by: Tomeu Vizoso tomeu.vizoso@collabora.com