pass python 2 and 3 as a single argument for osx build

Author: Lawrence Nahum

.gitlab-ci.yml

@@ -53,7 +53,7 @@ osx_release:
     - wally_dist/*
   script:
     - cd $CI_PROJECT_DIR
-    - ./tools/build_python_wheels.sh python python3
+    - ./tools/build_python_wheels.sh "python python3"
 
 armv7l_release:
   tags: