Bug#1031155: fakeupstream.cgi: google-fonts: Script breaks if FONTLOG.txt is missing

[Gioele Barabucci <gioele@svario.it>]

Package: qa.debian.org
Tags: patch

Some fonts on Google Fonts do not have a `FONTLOG.txt`. 
`fakeupstream.cgi` currently generates a 500 error when it scrapes such 
fonts.

Example of font without `FONTLOG.txt`: 
<https://github.com/google/fonts/tree/main/ofl/kristi>.

For such fonts one can get a date (i.e. version number) from `METADATA.pb`.

Patch: https://salsa.debian.org/qa/qa/-/merge_requests/44

Regards

--
Gioele Barabucci