Fix __constant error for nvidia device
Fix __constant error for nvidia device

ianhuang-777/guetzli,ianhuang-777/guetzli,guanzidashu/guetzli_ios_metal,ianhuang-777/guetzli,guanzidashu/guetzli_ios_metal,ianhuang-777/guetzli,guanzidashu/guetzli_ios_metal,guanzidashu/guetzli_ios_metal