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/sm/source/sm_manager_service.cpp

@@ -24,9 +24,9 @@ Result ManagerService::handle_deferred() {
 
 
 std::tuple<Result> ManagerService::register_process(u64 pid, InBuffer<u8> acid_sac, InBuffer<u8> aci0_sac) {
-    return std::make_tuple(Registration::RegisterProcess(pid, acid_sac.buffer, acid_sac.num_elements, aci0_sac.buffer, aci0_sac.num_elements));
+    return {Registration::RegisterProcess(pid, acid_sac.buffer, acid_sac.num_elements, aci0_sac.buffer, aci0_sac.num_elements)};
 }
 
 std::tuple<Result> ManagerService::unregister_process(u64 pid) {
-    return std::make_tuple(Registration::UnregisterProcess(pid));
-}
+    return {Registration::UnregisterProcess(pid)};
+}