WOFF2 Glyf Transform for Arabic, Indic, and LGC simulations

Previously I reported the effect on performance of adding woff2
glyf transformation to patch subset patch computation for CJK. I just
finished running the same test against the Arabic, Indic, and LGC data
sets. Results are looking very good for those scripts as well. We see a
pretty similar reduction in total bytes transferred of 10-15%:

https://raw.githubusercontent.com/googlefonts/PFE-analysis/woff2_plots/results/07-08-2020/comparison.woff2.arabic_indic.sampled_500.bytes.png
https://raw.githubusercontent.com/googlefonts/PFE-analysis/woff2_plots/results/07-08-2020/comparison.woff2.arabic_indic.sampled_500.cost.png
https://raw.githubusercontent.com/googlefonts/PFE-analysis/woff2_plots/results/07-08-2020/comparison.woff2.latin.sampled_1000.bytes.png
https://raw.githubusercontent.com/googlefonts/PFE-analysis/woff2_plots/results/07-08-2020/comparison.woff2.latin.sampled_1000.cost.png