[Bug lto/86004] [9 regression] Several lto test cases begin failing with r260963

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86004

--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
Both of our (Red Hat internal) build servers have been upgraded to Fedora 29 so
we don't see the failures anymore but they will still com up on systems with
older Binutils.   Is it possible to add some sort of a dg-require-xxx to
prevent the tests from failing when the installed version of Binutils isn't up
to par?