Javascript version of the Library

[ghost]

I am opening this issue to see if anyone is interested in contributing.

As QNNPACK have minimum dependecy, it is possible to use amalgamation and emscripten to build a javascript version of the library. See https://github.com/dmlc/mxnet.js as an example for our deep learning project.

This could be fun for some usecases, to run QNNPACK on the browser and provide some cool demos

https://cnpmjs.org/package/nbind