Are we exporting OTF-CFF from sources converted to TTF?

For the Intel Mono project we noticed gftools builder was turning the sources to TTF masters before exporting OTF-CFF binaries, instead of exporting directly from the sources that have postscript contours —ending up in otf-cff files with `gasp` and `prep` tables. This seems to be a Builder issue since exporting directly with Fontmake is okay.

Also reported by designers but that may be a Fontmake issue (not builder):
- StemSnapH parameter is missing from CFF
- in the CFF table, it looks like any slashes have gone missing, which garbles the URL in the copyright notice. Not sure how relevant this is, the name table is OK
- PANOSE information is missing from OS/2 table

ref: https://github.com/RosaWagner/intel-one-mono/tree/googlefonts