[aur-general] Merge request for two GTK Themes

Hi, following Maxime suggestions, I renamed two of my packages. Please merge: https://aur.archlinux.org/packages/gtk-theme-stepintofreedom/ into https://aur.archlinux.org/packages/gtk-theme-step-into-freedom/ and https://aur.archlinux.org/packages/gtk-theme-ubuntusunrise/ into https://aur.archlinux.org/packages/gtk-theme-ubuntu-sunrise/ Thanks, have a nice day. Edoardo