.gitlab-ci.yml: include 'make sha1' to track sha1 in deployed clients

See #1847.
4 jobs for prod-client
Status Job ID Name Coverage
  Test Quality
canceled #7006
code_quality

 
  Test Unit
skipped #7007
test_browser_unit
 
  Test Functional
skipped #7008
test_browser-functional
 
  Deploy
skipped #7009
deploy_prod