Add yaourt --sucre alias in archlinux plugin

plugins/archlinux/archlinux.plugin.zsh

@@ -9,6 +9,7 @@ if [[ -x `which yaourt` ]]; then
   alias yaconf='yaourt -C'        # Fix all configuration files with vimdiff
   # Pacman - https://wiki.archlinux.org/index.php/Pacman_Tips
   alias yaupg='yaourt -Syu'        # Synchronize with repositories before upgrading packages that are out of date on the local system.
+  alias yasu='yaourt --sucre'      # Same as yaupg, but without confirmation
   alias yain='yaourt -S'           # Install specific package(s) from the repositories
   alias yains='yaourt -U'          # Install specific package not from the repositories but from a file 
   alias yare='yaourt -R'           # Remove the specified package(s), retaining its configuration(s) and required dependencies