[Bug testsuite/117494] pr101145inf.c fails on RISC-V without V extension (and maybe other architectures with a CPU lacking vector extension)

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117494

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 59614
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59614&action=edit
Fix I think

This should fix it. signal is the check that is needed here rather than
`*-*-linux* *-*-gnu* *-*-uclinux* `.

Plus I added check_vect. Note riscv didn't update tree-vect.h's check_vect ...