change fasta and fasta-redux benchmark to Veedrac's implementation

[llogiq]

I just removed the num_cpus dependency (because we don't want that in there), using 4 threads instead.

I should add that Veedrac asked me to submit this here in his name.

[rust-highfive]

r? @pcwalton

(rust_highfive has picked a reviewer for you, use r? to override)

[alexcrichton]

r? @brson

Not sure if there's license things here we should worry about

[llogiq]

@Veedrac may have something to say about that.

[Veedrac]

Thanks for submitting this.

I'm not totally sure what licensing issue is being mentioned. I wouldn't be concerned if it was accepted as-is, though.

[llogiq]

As far as I'm concerned, the implementation makes use of algorithms from both wikipedia and other benchmark sources (in different languages). The used algorithms themselves aren't subject to any patents I know of, and AFAIK Veedrac didn't make use of other sources that would have require him to submit to a license. I've prepended the usual headers to both files (and I think Veedrac's comment clarifies his agreement to allowing rust-lang to use his code).

@alexcrichton What other license things should we look out for?

[alexcrichton]

I have no specific concerns, I simply do not know what to even look for. @brson is our resident license expert so I'm deferring to him. Everything is probably fine, I just don't want to have to patch anything up after-the-fact.

[llogiq]

Good to know. So @brson, do we need to clarify something?

[brson]

@bors r+ lgtm

[bors]

📌 Commit 12d990d has been approved by brson

[bors]

⌛ Testing commit 12d990d with merge 19fe7b6...

[bors]

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-x-android-t, auto-mac-32-opt, auto-mac-64-nopt-t, auto-mac-64-opt, auto-win-gnu-32-nopt-t, auto-win-gnu-32-opt, auto-win-gnu-64-nopt-t, auto-win-gnu-64-opt, auto-win-msvc-32-opt, auto-win-msvc-64-opt