meso: skeleton libmesosphere in prep for kernelldr dev

libraries/libvapours/include/vapours/includes.hpp

@@ -54,11 +54,20 @@
 
 #ifdef ATMOSPHERE_BOARD_NINTENDO_SWITCH
 
+#ifdef ATMOSPHERE_IS_STRATOSPHERE
+
 /* Libnx. */
 #include <switch.h>
 
 #else
 
+/* Non-EL0 code can't include libnx. */
+#include "types.hpp"
+
+#endif
+
+#else
+
 #error "Unsupported board"
 
 #endif /* ATMOSPHERE_BOARD_NINTENDO_SWITCH */