Issue with Node 7.9.0 32 bit

[agjs]

When running node-nightly on 32-bit version, process.arch returns "ia32" which doesn't exist anywhere in node repositories neither in the files array in node-nightly-version module.

I've fixed this for myself by modifying the index.js in node-nightly.

// line 24
arch = process.arch === 'ia32' ? 'x86' : process.arch,

This fixed it for me. I'm not gonna do the pull request since this can be done better. I just wanted to inform you of this issue as other people might have the same issues.

[agjs]

I've created a pull request. In case you find the changes acceptable, please merge it.