BUG: Detection os SSE 4.1 and 4.2 on macOS

juce SystemStats detects SSE 4.1 and SSE 4.2 with the wrong constants according to the Intel documentation. I think it is a typo and provide a pull request to fix it below. I can offer a pull request against development if needed.

Pull Request available on github here

OK this is fixed on develop. Thank you for reporting!