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.

include/stratosphere/servicesession.hpp

@@ -158,22 +158,22 @@ class ServiceSession : public IWaitable {
         /* Control commands. */
         std::tuple<Result> ConvertCurrentObjectToDomain() {
             /* TODO */
-            return std::make_tuple(0xF601);
+            return {0xF601};
         }
         std::tuple<Result> CopyFromCurrentDomain() {
             /* TODO */
-            return std::make_tuple(0xF601);
+            return {0xF601};
         }
         std::tuple<Result> CloneCurrentObject() {
             /* TODO */
-            return std::make_tuple(0xF601);
+            return {0xF601};
         }
         std::tuple<Result, u32> QueryPointerBufferSize() {
-            return std::make_tuple(0x0, (u32)sizeof(this->pointer_buffer));
+            return {0x0, (u32)sizeof(this->pointer_buffer)};
         }
         std::tuple<Result> CloneCurrentObjectEx() {
             /* TODO */
-            return std::make_tuple(0xF601);
+            return {0xF601};
         }
         
         Result dispatch_control_command(IpcParsedCommand &r, IpcCommand &out_c, u64 cmd_id) {