emscripten: Include wasm64 or wasm32 in DTOOL_PLATFORM

dtool/src/dtoolbase/dtool_platform.h

@@ -66,7 +66,13 @@
 #endif
 
 #elif defined(__EMSCRIPTEN__)
+#if defined(__wasm64__)
+#define DTOOL_PLATFORM "emscripten_wasm64"
+#elif defined(__wasm32__)
+#define DTOOL_PLATFORM "emscripten_wasm32"
+#else
 #define DTOOL_PLATFORM "emscripten"
+#endif
 
 #elif defined(__aarch64__)
 #define DTOOL_PLATFORM "linux_aarch64"