Makefile incorrect for hb-subset

[MattMatic]

The current makefile tries to call hb-subset with the same source filename and destination filename.

On WSL Ubuntu, this produces a "Bus error".

Changed the release: first two lines to:
hb-subset --unicodes='*' --name-IDs='*' $(FINAL_FONT) --layout-features="*" -o $(FINAL_FONT).sub
. venv/bin/activate; ttfautohint $(FINAL_FONT).sub $(FINAL_FONT).autohint

So that the subsetted font is saved with extension .sub.

This is part of a broader issue that cannot build release Gulzar to match

[MattMatic]

Working through setting up a macOS build...

Worth pointing out that HarfBuzz (installed with Homebrew) handles the Makefile hb-subset just fine 🙄