glFenceSync and glClientWaitSync causing 'null function or function signature mismatch'

Please include the following in your bug report:

**Version of emscripten/emsdk:**
3.0.1

**Full link command and output with `-v` appended:**
-s EVAL_CTORS=0
-s MIN_WEBGL_VERSION=1
-s MAX_WEBGL_VERSION=2
-s USE_WEBGL2=1
-s FULL_ES2=1
-s FULL_ES3=1
--bind
-s BINARYEN_EXTRA_PASSES=--one-caller-inline-max-function-size=1024
-s TOTAL_STACK=16mb
-s TOTAL_MEMORY=128mb
-s ALLOW_MEMORY_GROWTH=0
-Os

I am debugging a graphics C++ application on WebAssembly which directly calls OpenGL commands. When I compile and run the following code:
```
GLsync sync = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
glClientWaitSync(sync, 0, 0); // same issue with glWaitSync(sync, 0, GL_TIMEOUT_IGNORED);
```

I get the following exception:
`null function or function signature mismatch`

on Chrome 96.0.4664.110.

Any ideas on where the error might be caused from? In the js glue file, i see:

```
function _emscripten_glWaitSync(sync, flags, timeoutLo, timeoutHi) {
// See WebGL2 vs GLES3 difference on GL_TIMEOUT_IGNORED above (https://www.khronos.org/registry/webgl/specs/latest/2.0/#5.15)
GLctx.waitSync(GL.syncs[sync], flags, convertI32PairToI53(timeoutLo, timeoutHi));
}
```
which i tried printing a manual console log in to see if it ever gets invoked. The console log does not get invoked before the error.