mate-control-center: add gsettings schemas path to XDG vars
mate-control-center depends on mate-settings-daemon, but the later needs
gsettings schemas provided by the former. To fix this the gsettings schema
path from mate-control-center is added to XDG_DATA_DIRS at session
startup.
authored by José Romildo Malaquias and committed by Tuomas Tynkkynen ca27392d 002fcfca