SIMD-compared tests
SIMD-compared tests

* For the `test…Math()` tests, comparing the Vuckt-computed math result against the Swift-SIMD-computed math result (instead of against hard-coded expected results).  
	▸ This could now potentially loop over all the test value presets, but it's not really necessary yet— I'm just quick-checking for obvious implementation mistakes.
capnslipp/IntN,capnslipp/IntN