Add flatpak manifest

https://gitlab.gnome.org/GNOME/cheese/issues/6

data/org.gnome.Cheese.yml

@@ -0,0 +1,61 @@
+id: org.gnome.Cheese
+runtime: org.gnome.Platform
+sdk: org.gnome.Sdk
+runtime-version: 3.30
+command: cheese
+tags:
+  - nightly
+desktop-file-name-prefix: '(Nightly) '
+finish-args:
+  - --share=ipc
+  - --socket=fallback-x11
+  - --socket=pulseaudio
+  - --socket=wayland
+  - --device=all
+  - --filesystem=xdg-run/dconf
+  - --filesystem=~/.config/dconf:ro
+  - --talk-name=ca.desrt.dconf
+  - --env=DCONF_USER_CONFIG_DIR=.config/dconf
+  - --filesystem=xdg-pictures
+  - --filesystem=xdg-videos
+cleanup:
+  - /include
+  - /lib/girepository-1.0
+  - /lib/pkgconfig
+  - /man
+  - /share/aclocal
+  - /share/gir-1.0
+  - /share/pkgconfig
+  - /share/man
+  - /share/gtk-doc
+  - '*.la'
+  - '*.a'
+modules:
+  - name: gnome-desktop
+    buildsystem: meson
+    config-opts:
+      - -Ddebug_tools=false
+      - -Dudev=disabled
+    sources:
+      - type: git
+        url: https://gitlab.gnome.org/GNOME/gnome-desktop.git
+  - name: totem-pl-parser
+    buildsystem: meson
+    sources:
+      - type: git
+        url: https://gitlab.gnome.org/GNOME/totem-pl-parser.git
+  - name: totem-video-thumbnailer
+    buildsystem: meson
+    sources:
+      - type: git
+        url: https://gitlab.gnome.org/GNOME/totem-video-thumbnailer.git
+  - name: gnome-video-effects
+    sources:
+      - type: git
+        url: https://gitlab.gnome.org/GNOME/gnome-video-effects.git
+  - name: cheese
+    config-opts:
+      - --disable-introspection
+    sources:
+      - type: git
+        url: https://gitlab.gnome.org/GNOME/cheese.git