SotBE S1: enable AI gold saving

The scenario is both harder and more interesting this way and was
rebalanced with gold saving on before the AI default was changed.

data/campaigns/Son_Of_The_Black_Eye/scenarios/01_End_of_Peace.cfg

@@ -80,6 +80,21 @@
         team_name=Humans
         user_team_name=_ "Humans"
 
+        [ai]
+            [aspect]
+                id=recruitment_save_gold
+                [facet]
+                    [value]
+                        active=2
+                        begin=1.5
+                        end=1.1
+                        spend_all_gold=-1
+                        save_on_negative_income=no
+                    [/value]
+                [/facet]
+            [/aspect]
+        [/ai]
+
         {GOLD 140 200 260}
 
         {FLAG_VARIANT loyalist}