Set SRCALPHA flag on conformance test surfaces so transparency is handled correctly.
Set SRCALPHA flag on conformance test surfaces so transparency is handled correctly.

caseyc37/pygame_cffi,CTPUG/pygame_cffi,CTPUG/pygame_cffi,GertBurger/pygame_cffi,GertBurger/pygame_cffi,caseyc37/pygame_cffi,GertBurger/pygame_cffi,caseyc37/pygame_cffi,GertBurger/pygame_cffi,CTPUG/pygame_cffi