Is there a missing dependency on `ERRNO_CODES` from emscripten?

[sbc100]

See https://github.com/emscripten-core/emscripten/issues/14783

I'm not familiar with how BrowserFS is used but in order to use emscripten's $ERRNO_CODES it somehow needs to be pulled in as a dependency (for library JS files this involves a __deps entry, otherwise we have the DEFAULT_LIBRARY_FUNCS_TO_INCLUDE command line setting).

My understanding is that prior to https://github.com/emscripten-core/emscripten/pull/14730, $ERRNO_CODES was likely being pulled in indirectly.