Host DoYouEvenBench on webkit.org

Host DoYouEvenBench on webkit.org
https://bugs.webkit.org/show_bug.cgi?id=127185

Reviewed by Benjamin Poulain.

PerformanceTests:

Compute the resources directory relative to the benchmark-runner's location
so that we can load tests even if the runner HTML was located elsewhere.

* DoYouEvenBench/Full.html:
* DoYouEvenBench/resources/benchmark-runner.js:
(BenchmarkState._containingDirectory):

Websites/webkit.org:

Added webkit.org/perf/DoYouEvenBench.

* perf/DoYouEvenBench: Added.
* perf/DoYouEvenBench/index.html: Copied from PerformanceTests/DoYouEvenBench/Full.html.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@162216 268f45cc-cd09-0410-ab3c-d52691b4dbfc