[X86] Regenerate test checks (NFC)

This runs the test through -instnamer and generates test checks
using update_test_checks.py. (The previous comment indicated that
update_llc_test_checks.py was used, but I rather doubt that.)

This relies on the non-determinism fix from
fbb72530,
the previous check lines have apparently been written to accomodate
that non-determinism.