Added both exe files to the outputs list.

my-packages/my-games.scm

@@ -236,6 +236,8 @@ strife, chex quest, and fan-created games like harmony, hacx and freedoom.")
           sdl2-net
           sdl2-ttf
           zlib))
+   (outputs
+    '("barony" "barony-editor"))
    (native-inputs
     (list pkg-config))
    (home-page "https://baronygame.com")