Replace std::make_tuple with simpler syntax (#77)

* boot2: Simplify g_additional_launch_programs

It appears that Stratosphère is targeting C++17. In C++17,
std::make_tuple is not required for initialisating a tuple anymore.
Same thing, but less typing

* Replace std::make_tuple with {}

More readable and less noise. Also fixes two missing return statements.

stratosphere/loader/source/ldr_shell.cpp

@@ -21,11 +21,11 @@ Result ShellService::dispatch(IpcParsedCommand &r, IpcCommand &out_c, u64 cmd_id
 
 std::tuple<Result> ShellService::add_title_to_launch_queue(u64 tid, InPointer<char> args) {
     fprintf(stderr, "Add to launch queue: %p, %X\n", args.pointer, args.num_elements);
-    return std::make_tuple(LaunchQueue::add(tid, args.pointer, args.num_elements));
+    return {LaunchQueue::add(tid, args.pointer, args.num_elements)};
 }
 
 std::tuple<Result> ShellService::clear_launch_queue(u64 dat) {
     fprintf(stderr, "Clear launch queue: %lx\n", dat);
     LaunchQueue::clear();
-    return std::make_tuple(0);
-}
+    return {0};
+}