formula_creator: keep std_configure_args

[cho-m]

Match homebrew-core preferences where we usually keep std_configure_args even if some args are unrecognized and where we pass any additional args before std_configure_args.

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes? Here's an example.
• Have you successfully run brew style with your changes locally?
• Have you successfully run brew typecheck with your changes locally?
• Have you successfully run brew tests with your changes locally?

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I think we usually only need to remove these options if upstream is using a non-autotools configure script which has strict failures on undefined options.

[MikeMcQuaid]

Thanks @cho-m and @p-linnane!