Base runtime freedesktop-sdk-runtime-19-08

[valentind]

@jamesh

I guess my feeling is that we should treat these third party bases the same way we treat application snaps: that we should try to control what those executables could do rather than control access to the libraries/executables themselves.

This is what we want for Freedesktop SDK. We do not need anything special. We only provide files, some are executable, and there is no suid or sgid. I believe most of 3rd party base runtimes will want the same.