// The code reading this data is in package debug/buildinfo.
	ldr := ctxt.loader
	s := ldr.CreateSymForUpdate("go:buildinfo", 0)
	s.SetType(sym.SBUILDINFO)
	s.SetAlign(16)
	// The \xff is invalid UTF-8, meant to make it less likely
	// to find one of these accidentally.
	const prefix = "\xff Go buildinf:" // 14 bytes, plus 2 data bytes filled in below
	data := make([]byte, 32)