Add 'app/' from commit 'a11a66886941bba128d89c1124115e1b1c87a128'

git-subtree-dir: app
git-subtree-mainline: 6ebd902c6b
git-subtree-split: a11a668869

app/linux/runner/main.cc

@@ -0,0 +1,6 @@
+#include "my_application.h"
+
+int main(int argc, char** argv) {
+  g_autoptr(MyApplication) app = my_application_new();
+  return g_application_run(G_APPLICATION(app), argc, argv);
+}