gnu: abbaye: Rename package to l-abbaye-des-morts.

* gnu/packages/games.scm (abbaye): Define in terms of
'deprecated-package'.
(l-abbaye-des-morts): New variable, formerly known as "abbaye".

gnu/packages/games.scm

@@ -1188,9 +1188,9 @@ can be explored and changed freely.")
     ;; state "GNU General Public Licence" without specifying a version.
     (license license:gpl1+)))
 
-(define-public abbaye
+(define-public l-abbaye-des-morts
   (package
-    (name "abbaye")
+    (name "l-abbaye-des-morts")
     (version "2.0.1")
     (source
      (origin
@@ -1242,6 +1242,9 @@ them, called Jean Raymond, found an old church in which to hide, not knowing
 that beneath its ruins lay buried an ancient evil.")
     (license license:gpl3)))
 
+(define-public abbaye
+  (deprecated-package "abbaye" l-abbaye-des-morts))
+
 (define-public angband
   (package
     (name "angband")