[Bug go/92861] Passes relative time to sem_timedwait on GNU/Hurd

[samuel.thibault@ens-lyon.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92861

--- Comment #3 from Samuel Thibault <samuel.thibault@ens-lyon.org> ---
Created attachment 47446
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47446&action=edit
fix duplicate definition

Ah, sorry, _CLOCK_REALTIME is actually already getting defined in the generated
libgo/runtime_sysinfo.go file, the attached patch is needed on top of what was
already committed.