Update .gitlab-ci.yml

2 jobs for master in 3 minutes and 16 seconds (queued for 10 minutes and 8 seconds)
Status Job ID Name Coverage
  Build
failed #251071
build-mlmc

00:03:16

 
  Test
skipped #251075
test-mlmc
 
Name Stage Failure
failed
build-mlmc Build
[ 91%] Linking CXX static library ../../../lib/libgtest.a
[ 91%] Built target gtest
[ 92%] Linking CXX static library libSRC.a
[ 92%] Built target SRC
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2
Running after_script
Uploading artifacts for failed job
ERROR: Job failed: exit status 1