cmap-format12-only files created by ttx & remove all other cmap entries

Inconsolata-Regular.abc.widerc.ttf has the hmtx width of "c" set to 600; everything else is 500. Subsetting out c should reduce numberOfHMetrics to 1.

chromacheck-* fonts are from https://github.com/RoelN/ChromaCheck/tree/master/fonts and licensed under MIT by Roel Nieskens and Google.

RanaKufi-Regular.subset.otf is from https://github.com/alif-type/rana-kufi/ but the subset is licensed for us in MIT for the project use.

glyphs.ttf is from https://github.com/RazrFalcon/ttf-parser/blob/337e7d1/tests/fonts/glyphs.ttf