Trying to find where golang runtime.inc.raw is generated

[Lance Fredrickson <lance@xxxxxxxxxxxxxxxxxxxxx>]

I'm trying to troubleshoot this issue I have.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101246

runtime.inc used for golang is missing a couple struct definitions. I 
want to see how runtime.inc.raw is generated, because runtime.inc is 
derived from it. I think this could be an easy fix, but it's tricky 
navigating gcc code for the first time.

thanks,
Lance Fredrickson