Bump campaign version to 8.0 for latest DCS.

Building IDs changed again. Ack the change in my two campaigns which
don't use these target types.

game/version.py

@@ -106,4 +106,8 @@ VERSION = _build_version_string()
 #:
 #: Version 7.1
 #: * Support for Mariana Islands terrain
-CAMPAIGN_FORMAT_VERSION = (7, 1)
+#:
+#: Version 8.0
+#: * DCS 2.7.4.9632 changed scenery target IDs. Any mission using map buildings as
+#:   strike targets must check and potentially recreate all those objectives.
+CAMPAIGN_FORMAT_VERSION = (8, 0)

resources/campaigns/battle_of_abu_dhabi.json

@@ -7,5 +7,5 @@
   "description": "<p>You have managed to establish a foothold near Ras Al Khaima. Continue pushing south.</p>",
   "miz": "battle_of_abu_dhabi.miz",
   "performance": 2,
-  "version": "7.0"
+  "version": "8.0"
 }

resources/campaigns/black_sea.json

@@ -5,5 +5,5 @@
   "description": "<p>A medium sized theater with bases along the coast of the Black Sea.</p>",
   "miz": "black_sea.miz",
   "performance": 2,
-  "version": "7.0"
+  "version": "8.0"
 }