Limit phoc dependencies

Merged Pablo Correa Gomez requested to merge pabloyoyoista/aports:limit-phoc-depends into master

Phoc currently depends on mutter, although the dependency is not directly specified (usually phoc is installed by phosh and mutter is pulled in by phosh -> gnome-session -> gnome-shell -> mutter), so in consequence phoc is broken if mutter is missing.

However, phoc does not need from mutter the whole binary, but just the gsettings schemas. In this MR I have implemented a similar solution to debian[1][2], where I just packed the schemas in their own subpackage that phoc can depend on.

[1] https://gitlab.gnome.org/World/Phosh/phoc/-/blob/master/debian/control#L39

[2] https://packages.debian.org/sid/all/mutter-common

Edited by Pablo Correa Gomez

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