malcontent-control: Add a desktop file

Signed-off-by: Philip Withnall <withnall@endlessm.com>

malcontent-control/meson.build

@@ -17,6 +17,27 @@ malcontent_control = executable('malcontent-control',
   install: true,
 )
 
+desktop_file = i18n.merge_file('desktop-file',
+  type: 'desktop',
+  input: '@0@.desktop.in'.format(application_id),
+  output: '@0@.desktop'.format(application_id),
+  po_dir: join_paths(meson.source_root(), 'po'),
+  install: true,
+  install_dir: join_paths(get_option('datadir'), 'applications'),
+)
+
+desktop_file_validate = find_program('desktop-file-validate', required: false)
+if desktop_file_validate.found()
+  test(
+    'validate-desktop',
+    desktop_file_validate,
+    args: [
+      desktop_file.full_path(),
+    ],
+    suite: ['malcontent-control'],
+  )
+endif
+
 # FIXME: Add icons and tests
 #subdir('icons')
 #subdir('tests')