[Bug libgomp/64635] darwin produces libgomp-plugin-host_nonshm.1.dylib but tries to load libgomp-plugin-host_nonshm.so.1

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64635

--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> ---
oh, and IIRC, the shlib suffix for AIX is .a so there might be another case to
placed.