ci: Save artifacts on non-master branches

.gitlab-ci.yml

@@ -11,9 +11,15 @@ cache:
 
 test_branch:
   script:
-    - stack --no-terminal --system-ghc --no-install-ghc build --test --haddock --no-haddock-deps --bench --no-run-benchmarks
+    - stack --no-terminal --system-ghc --no-install-ghc build --copy-bins --test --haddock --no-haddock-deps --bench --no-run-benchmarks
+    - cp -r ~/.local/bin/ copar-linux-binaries
   except:
     - master
+  artifacts:
+    name: "${CI_PROJECT_NAME}-linux-binaries"
+    expire_in: 2 weeks
+    paths:
+        - copar-linux-binaries/
 
 test:
   script: