Linux extra condition for electron builder.

[lotharthesavior]

To begin with, thank you so much for your hard work. This is an a fantasticep for the PHP community!

This is not meant to be the final solution, but it solves the problem pointed out at this issue: https://github.com/NativePHP/electron/issues/55

After briefly checking the code, I cou't find any place to trigger the npm post-installation to have the option --linux. Due to that, an extra check for the platform was needed for the initial script to copy the binary from Linux folder.

The same fix might be needed for Windows.

[mpociot]

Thank you very much for taking the time to send a PR.
I'd like to wait before emerging this for @chrisreedio and his work on #47 as I think this will already incorporate this change as well as other windows related changes.
I'll come back to this once #47 is ready to be merged

[arnolem]

Thanks @lotharthesavior.
It works perfectly for me on WSL/Ubuntu 22.04

[marcelo2605]

Thanks @lotharthesavior! Works on Ubuntu 22.04.2

[haiderlatitude]

Can anyone explain to me what exactly to do on Ubuntu. I couldn't understand.

[mpociot]

As the Windows PR still is being worked on and the changeset is so small, let's get this merged in now 🤷

Thanks again!