[Bug lto/69607] undefined reference to MAIN__._omp_fn.0 in atomic_capture-1.f with -flto

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69607

--- Comment #15 from vries at gcc dot gnu.org ---
(In reply to vries from comment #14)
> Created attachment 37616 [details]
> further updated tentative patch

Fixes -fno-use-linker-plugin failures, apart from:
- PR69707
- PR69705
- PR67709