note: fixes issue #39

note: due to the change in gftools, the script generates a new build-#############.ninja file with every build, so if you build multiple times, your sources/ directory fills up with them. This wasn't an issue before because gftools just overwrote build.ninja with every build. I could add something to the script to delete the generated file after it's done, but wasn't sure if it would be necessary.

ok, so with the fixes to the individual repos like these: notofonts/tangut@fd05a0c

this PR is no longer necessary as the build process doesn't seem to be using notobuilder.notobuilder at all. notobuilder.notoqa of course is still being used, but it means that I assume notobuilder.notobuilder could be removed entirely.

I'm going to leave this PR open for @simoncozens's thoughts on the matter, feel free to close whenever it's reasonable.

Yep, notobuilder.__main__ is dead now; building should just use gftools-builder. The module is sticking around for rebuilding the websites, making UI VFs etc, but this PR is now unnecessary. But thank you anyway!