Enabling Asyncify breaks module: Module.dynCall_i is not a function

```
Uncaught (in promise) TypeError: Module.dynCall_i is not a function
invoke_i http://localhost:8000/build/MyProject.js:1
wrapper http://localhost:8000/build/MyProject.js:1
callMain http://localhost:8000/build/MyProject.js:1
doRun http://localhost:8000/build/MyProject.js:1
run http://localhost:8000/build/MyProject.js:1
createModule http://localhost:8000/build/MyProject.js:1
load http://localhost:8000/wrapper.js:71
http://localhost:8000/main.js:1
MyProject.js:1:129537
```

The link flags are as follows:

```cmake
set_target_properties(MyProject PROPERTIES LINK_FLAGS "-s WASM=1 -s MAIN_MODULE=1 \
-s ERROR_ON_UNDEFINED_SYMBOLS=0 -s EXPORT_NAME=createModule -s MODULARIZE=1 \
-s FORCE_FILESYSTEM -s EXPORTED_RUNTIME_METHODS=[\"FS\"] -s WASMFS=1 -fPIC -fexceptions --no-entry \
-z muldefs -s ALLOW_MEMORY_GROWTH -s ASYNCIFY -s DYNCALLS -s ASYNCIFY_DEBUG -lasync.js \
-s ASYNCIFY_ONLY=[\"extractFile(std::__2::basic_string?.std::__2::allocator>)\"] ")
```

Adding/removing `-s DYNCALLS` and/or `-lasync.js` seems to have no effect. The project works fine when Asyncify is not enabled.