Building for multiple CPU targets produces wrong output

[jasongin]

First I built for --platform=desktop and --dest-cpu=x86, and it produced output in out/nodejs_desktop_x86.

Then I built for --platform=desktop and --dest-cpu=x64, and it produced output in out/nodejs_desktop_x64 with exactly the same binaries as the x86 output.

After I cleaned everything and started over, I was able to build proper x64 binaries.

[obastemur]

@jasongin I need more input on this as I'm unable to reproduce it on Windows using nodejs as target