Add in that -g flag

- maybe we do need it in CI idk what I'm doing ok

.gitlab-ci.yml

@@ -2,7 +2,7 @@ image: node:4.2.6
 
 build_css:
     before_script:
-        - npm install grunt-cli
+        - npm install -g grunt-cli
         - npm install
     script:
         - grunt swatch:masonstrap