[Bug testsuite/97688] check_vect doesn't detect AVX2 on zen

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97688

--- Comment #10 from H.J. Lu <hjl.tools at gmail dot com> ---
FWIW, x86 source in gcc testsuite should be converted to
__builtin_cpu_supports().