Add proper def file for guest video driver now that it compiles. Put ifdef hack FAISALMEMON_S4_SGIMAGE around the reqhandlerextensionlib.mmp because this appears to be consuming a platform available sgresource header only available in s4. We want a minimal port for s3 here.

EXPORTS
	?GetEglTestStep@EglTestStepFactory@@SAPAVCEglTestStep@@ABVTDesC16@@@Z @ 1 NONAME ; class CEglTestStep * EglTestStepFactory::GetEglTestStep(class TDesC16 const &)