Switch atmosphere's build target to C++20. (#952)

* ams: update to build with gcc10/c++20

* remove mno-outline-atomics

* ams: take care of most TODO C++20s

* fusee/sept: update for gcc10

* whoosh, your code now uses pre-compiled headers

* make: dependency fixes

stratosphere/dmnt/source/cheat/impl/dmnt_cheat_api.cpp

@@ -13,6 +13,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+#include <stratosphere.hpp>
 #include "dmnt_cheat_api.hpp"
 #include "dmnt_cheat_vm.hpp"
 #include "dmnt_cheat_debug_events_manager.hpp"
@@ -141,7 +142,7 @@ namespace ams::dmnt::cheat::impl {
                         }
 
                         /* Clear metadata. */
-                        static_assert(std::is_pod<decltype(this->cheat_process_metadata)>::value, "CheatProcessMetadata definition!");
+                        static_assert(util::is_pod<decltype(this->cheat_process_metadata)>::value, "CheatProcessMetadata definition!");
                         std::memset(&this->cheat_process_metadata, 0, sizeof(this->cheat_process_metadata));
 
                         /* Clear cheat list. */