[Bug target/113218] gcc -pg fails on contemporary FreeBSD

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113218

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Basically FBSD_LIB_SPEC in gcc/config/freebsd-spec.h should be modified to
`%{pg:` related parts. But only do that for FBSD_MAJOR >= 14 ...