ci: split crypto into build and test stages

.gitlab-ci.yml

@@ -105,6 +105,16 @@ build legacy emu:
     untracked: true
     expire_in: 1 day
 
+build crypto:
+  stage: build
+  script:
+    - cd crypto
+    - pipenv run make
+  artifacts:
+    name: "$CI_JOB_NAME-$CI_COMMIT_SHORT_SHA"
+    untracked: true
+    expire_in: 1 day
+
 test core unix unit:
   stage: test
   dependencies:
@@ -143,10 +153,10 @@ test legacy emu:
 
 test crypto:
   stage: test
-  dependencies: []  # no need to download artifacts
+  dependencies:
+    - build crypto
   script:
     - cd crypto
-    - pipenv run make
     - ./tests/aestst
     - ./tests/test_check
     - CK_TIMEOUT_MULTIPLIER=20 valgrind -q --error-exitcode=1 ./tests/test_check