If the build system for packages has a umask of `0077`, cloned
repositories will have no permissions for group and other. As the build
scripts for some packages just copy from clone git repos, this will
preserve the permissions in the package and prevent the following
services from startup:
* `bbb-html5`
* `etherpad`
* `bbb-pads`
* `bbb-export-annotations`
* `bbb-rap-*`
This patch grants everyone read permissions to the code in the packages.
