add avx512 to exported embree targets
add avx512 to exported embree targets

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