Add newsfile for mask changes in the official tree.
Add news for portage import
caja-1.8: New stable
libmatekbd-1.8: New stable
mate-1.8: New stable
mate-applets-1.8: New stable
mate-common-1.8: New stable
mate-control-center-1.8: New stable
mate-menus-1.8: New stable
mate-panel-1.8: New stable
mate-session-manager-1.8: New stable
mate-settings-manager-1.8: New stable
caja-dropbox-1.7.90: New rc/stable
mate-calc-1.8: New stable
mate-dialogs-1.8: New stable
mate-media-1.8: New stable
mate-polkit-1.8: New stable
mate-screensaver-1.8: New stable
mate-sensors-applet-1.8: New stable
mate-system-monitor-1.8: New stable