Keep at least one weekly build on download servers
Some devices like shamu receive weekly builds for 15.1 and daily builds for 16.0. If the weekly build fails or is skipped for various reasons it often happens that there is no 15.1 build available for download because we only keep the last X builds.
I think its implemented that we keep 4 builds for devices which receive one version and eight builds for devices which receive two versions. Can this be changed in a way that we keep 4 builds per version?