Add option to specify output file location in sunspider.
https://bugs.webkit.org/show_bug.cgi?id=134339

Patch by Gergo Balogh <gbalogh.u-szeged@partner.samsung.com> on 2014-07-08
Reviewed by Darin Adler.

PerformanceTests/SunSpider:
* sunspider:

Tools:
* Scripts/run-sunspider:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@170881 268f45cc-cd09-0410-ab3c-d52691b4dbfc