Resolve conflict with lang/rakudo.

--- debian/ufoai.desktop.orig	Tue Apr 24 09:04:43 2012
+++ debian/ufoai.desktop	Mon Feb  4 18:48:28 2013
@@ -5,7 +5,7 @@ Name=UFO: Alien Invasion
 GenericName=UFO: Alien Invasion
 Comment=Turn-based tactical combat against hostile alien forces
 Comment[de_DE]=Rundenbasiertes Taktikspiel
-Exec=/usr/games/ufo
+Exec=/usr/games/ufoai
 Icon=ufoai.xpm
 Terminal=false
 Type=Application
