RISC-V: Add fixed PR111255 testcase by other patch

This patch add the missed PR111255 testcase which is fixed by this
committed patch (https://gcc.gnu.org/pipermail/gcc-patches/2023-August/628922.html).

	PR target/111255

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/vsetvl/pr111255.c: New test.