[Bug d/87864] libdruntime doesn't link with /bin/ld before Solaris 11.4

[ro at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87864

--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 45106
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45106&action=edit
Initial patch