Update generate_mips.py

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Status (for commit 732afc30a9748276d0c98e061842795112fa1ef2): 🥇 New best performance!

Current dhrystone MIPS (in commit 732afc30a9748276d0c98e061842795112fa1ef2): 98.98964113647405 Previous best (recorded in commit a0fc7eac0766f70973b648f91669e1276eb6c956): 84.84963545082081, difference +16.66%

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