Write verbose output to stderr
Write verbose output to stderr

guanzidashu/guetzli_ios_metal,szabadka/guetzli,dloeng/guetzli,google/guetzli,ianhuang-777/guetzli,guanzidashu/guetzli_ios_metal,dloeng/guetzli,ianhuang-777/guetzli,szabadka/guetzli,google/guetzli,szabadka/guetzli,guanzidashu/guetzli_ios_metal,ianhuang-777/guetzli,google/guetzli,guanzidashu/guetzli_ios_metal,ianhuang-777/guetzli,dloeng/guetzli,google/guetzli