~4.5% speed up on Odroid U3
~4.5% speed up on Odroid U3

Partial, confirmed improvements based on:
https://github.com/jthlim/zopfli/commit/51e477998c573e8eb0ce3abd14b9ca8c1fae6208

MrKrzYch00/zopfli,MrKrzYch00/zopfli