[AArch64][RISCV] Fix expected smulo/umulo test output

[AArch64][RISCV] Fix expected smulo/umulo test output

These tests were introduced in D109809 which I pushed on behalf of
@tangxingxin1008. I must have not understood the correct arcanist
workflow for this and as such may have locally tested a stale build.

This patch fixes the issue by re-running update_llc_test_checks.py on
all four tests.