sync gsettings.m4
sync gsettings.m4

Latest version of glib-compile-schemas removed the --uninstall option; trying
to use it break "make distcheck".

GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets,Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets