Giada packaging

Some flatpak note for Giada.

Permissions

• Device = all for MIDI and other
• Filestystem = home: fltk doesn't do portals
• pw-jack permissions
• No wayland as this is incompatible with audio plugins and fltk doesn't support it.

Patches

• patches/giada-fs.patch : still link against -lstdc++fs like it's Ubuntu.
• patches/giada-path.patch : need to set path for VST3.
• patches/giada-fmt.patch : patch to upstream: fmt::format expect a constexpr format.
• patches/juce-616-header.patch : some usual JUCE patches for newer gcc header layout.

Wrapper script

This is needed for LV2_PATH.

Buildsystem

giada doesn't build with cmake-ninja.

AppStream

I seems that upstream doesn't update the release in the AppStream file so this is done with cough sed. Let's hope appstream validate will catch the silent failure of sed.