main/gconf was removed upstream in Alpine:
0878ac0f6e
However, some packages in maemo/ (e.g. libhildon) still depend on it.
This breaks the package parsing in bpo: https://builds.sr.ht/~postmarketos/job/146132
ERROR: Package 'gconf-dev': Could not find aport, and could not find this package in any APKINDEX!
Add it to maemo/ for now to fix the error.
