Add a performance test for copying
https://bugs.webkit.org/show_bug.cgi?id=116394

Reviewed by Andreas Kling.

Added. We're going to skip this test by default since it's such a microbenchmark, and also because
it currently takes 30 minutes to run. As insane as it sounds, each copy takes rouhgly 57 seconds.

Running Interactive/CopyAll.html (1 of 1)
RESULT Interactive: CopyAll: Time= 57618.05 ms
median= 57135.0 ms, stdev= 1542.07271571 ms, min= 55095.0 ms, max= 60913.0 ms
RESULT Interactive: CopyAll: JSHeap= 102811.2 bytes
median= 103272.0 bytes, stdev= 1115.28148913 bytes, min= 100648.0 bytes, max= 103504.0 bytes
RESULT Interactive: CopyAll: Malloc= 446408712.0 bytes
median= 459156772.0 bytes, stdev= 20007346.3266 bytes, min= 415564040.0 bytes, max= 462011928.0 bytes
Finished: 1766.883236 s

* Interactive/CopyAll.html: Added.
* Skipped:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150341 268f45cc-cd09-0410-ab3c-d52691b4dbfc