[Bug testsuite/80557] rewrite absolute line numbers into relative or saved line numbers

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80557

--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
106 testcases remaining.

[ Or 94, if we ignore i386/avx-* (see PR80606). ]