Add benchmark for ESLint

[matthewnbrown]

I added the jshint.js file which ESLint uses as its performance benchmark. The file is rather large though, so it makes this benchmark the slowest of them all. I can remove it if desired.

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[matthewnbrown]

I signed it

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[mathiasbynens]

Is this (jquery) a copy-paste error?

[matthewnbrown]

Yeah, looks like I must've overlooked that.

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