Make stratosphere use new libnx HosVersion API

stratosphere/fatal/source/fatal_main.cpp

@@ -63,6 +63,8 @@ void __libnx_initheap(void) {
 void __appInit(void) {
     Result rc;
     
+    SetFirmwareVersionForLibnx();
+    
     rc = smInitialize();
     if (R_FAILED(rc)) {
         std::abort();