fixing error when adding new flag to empty flag list.
fixing error when adding new flag to empty flag list.
Merge commit 'f3564f663e2a522a62a245c946c57f5e0e2e45f2'
added custom command to remove test data before build, so that the copy in post is clean
added copy of dll on windows.
changed WinMain to standard main.
updte version fo cocos2d-x for cmake fix on win32