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

libraries/libstratosphere/source/ams/ams_environment.cpp

@@ -182,6 +182,9 @@ extern "C" {
 
 /* Custom abort handler, so that std::abort will trigger these. */
 void abort() {
+    static ams::os::Mutex abort_lock(true);
+    std::scoped_lock lk(abort_lock);
+
     ams::AbortImpl();
     __builtin_unreachable();
 }