[lld] r244050 - Add bare minimum to get a working i386 linux program.

[Rafael Espíndola]

> Is the intent to behave more like link rather than ld?  link bases the
> target machine based on the first input file if /machine is not specified.
> ld uses the emulation IIRC.

Detecting the correct arch from the inputs is also a nice feature of gold.

We should also add support for -m, of course.

Cheers,
Rafael