libtracker-miners-common: Allow readonly access to /etc/fonts
For some ungodly reason, we may end up with Fontconfig indirectly initialized (presumably from GStreamer modules). This library likes to have access to its default config directory, otherwise resulting in warnings like:
Fontconfig error: Cannot load default config file: Unable to open /etc/fonts/fonts.conf
Try to avoid this by allowing readonly access to this directory.
Closes: #314 (closed)