The web/emscripten build has been broken for an unknown amount of time
and for multiple reasons:
- Calling `cat` on Windows
- The latest version of wasm-ld does not support the `--no-undefined`
flag
- `ccall` was not being exported
Fixes#3272.
Allows building non-min-size builds with Emscripten.
Adds ENABLE_GLSLANG_WEB_DEVEL.
Moves the glslang.js files to OSDependent/Web.
Small cleanups and docs update.
