GIT links to gitlab.rtems.org need to use protocol=https

Summary

Moving to Gitlab has changed the git repo path from git://git.rtems.org to https://gitlab.rtems.org for read-only access. The RSB code download.py assumes anything with http/ https is a file download. The URLs should use protocol=https.

Steps to reproduce

../source-builder/sb-rtems-pkg

Solution

Change the URLs back to git://gitlab.rtems.org