Sprite Performance Test automation works OK
some fixes for perf tests
Compiles on VS2013
CCRANDOM_() uses std::rand() because it can be seeded with std::srand()

plus other minor fixes in perf tests
Compiles on VS2012...

hopefully
including <math.h> to make VS2012 Express happy
Compiles on VS2012

...hopefully. Using _MSC_VER < 1800 for CC_ROUND
Merge pull request #9260 from ricardoquesada/sprite_perf_test_automated

Sprite Performance Test automation works OK