make application runnable under flatpak, correct permission missing

data/meson.build

@@ -0,0 +1,43 @@
+desktop_file = i18n.merge_file(
+  input: 'org.kuchelmeister.toolbxtuner.desktop.in',
+  output: 'org.kuchelmeister.toolbxtuner.desktop',
+  type: 'desktop',
+  po_dir: '../po',
+  install: true,
+  install_dir: join_paths(get_option('datadir'), 'applications')
+)
+
+desktop_utils = find_program('desktop-file-validate', required: false)
+if desktop_utils.found()
+  test('Validate desktop file', desktop_utils,
+    args: [desktop_file]
+  )
+endif
+
+appstream_file = i18n.merge_file(
+  input: 'org.kuchelmeister.toolbxtuner.appdata.xml.in',
+  output: 'org.kuchelmeister.toolbxtuner.appdata.xml',
+  po_dir: '../po',
+  install: true,
+  install_dir: join_paths(get_option('datadir'), 'appdata')
+)
+
+appstream_util = find_program('appstream-util', required: false)
+if appstream_util.found()
+  test('Validate appstream file', appstream_util,
+    args: ['validate', appstream_file]
+  )
+endif
+
+install_data('org.kuchelmeister.toolbxtuner.gschema.xml',
+  install_dir: join_paths(get_option('datadir'), 'glib-2.0/schemas')
+)
+
+compile_schemas = find_program('glib-compile-schemas', required: false)
+if compile_schemas.found()
+  test('Validate schema file', compile_schemas,
+    args: ['--strict', '--dry-run', meson.current_source_dir()]
+  )
+endif
+
+subdir('icons')