Use correct path for persist_to_workspace

Author: marc-neureiter

.circleci/config.yml

@@ -36,8 +36,7 @@ references:
     persist_to_workspace:
       root: .
       paths:
-        - app/build
-        - sweetest/build
+        - "**/build"
   attach_workspace: &attach_workspace
     attach_workspace:
       at: *workspace
@@ -104,4 +103,4 @@ workflows:
       - lint_checks
       - test_unit:
           requires:
-            - assemble
+            - assemble