fix build errors compiling ispc emitted code for mic
fix build errors compiling ispc emitted code for mic

MengjiaoH/ospray,MengjiaoH/ospray,Twinklebear/OSPRay,ospray/OSPRay,ospray/OSPRay,MengjiaoH/ospray,Twinklebear/OSPRay,MengjiaoH/ospray,ospray/OSPRay,wilsonCernWq/ospray,favreau/OSPRay,favreau/OSPRay,wilsonCernWq/ospray,favreau/OSPRay,favreau/OSPRay,Twinklebear/OSPRay,wilsonCernWq/ospray,MengjiaoH/ospray,ospray/OSPRay,Twinklebear/OSPRay