Update x/sys to support go 1.17

[roopakv]

Updates x/sys to support go 1.17 which is blocking brew go 1.17

more context here: Homebrew/homebrew-core#83413

please cut a release after merging this.

[roopakv]

@jrasell could you please take a look at this, or help find the right person to review

[jrasell]

Hi @roopakv and thanks for this, it looks good. Would you be able to push a follow up commit to add a changelog entry as per this documentation? I believe this would fall under improvement.

[jrasell]

@roopakv I went ahead and pushed the changelog entry so I can merge this shortly. Thanks!

[roopakv]

@jrasell thank you so much. could you also please cut a new release so that brew is fully unblocked

[jrasell]

@roopakv we won't be cutting a release specifically for this, however, we are close to our next timing so it shouldn't be too long.

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