[Bug go/79122] go test -race reports import cycles with gccgo

[aconway at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79122

--- Comment #1 from Alan <aconway at redhat dot com> ---
Reported as:
https://github.com/golang/go/issues/18696
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79122