Cleaning up xdbf stuff.

- moving next to xex utils
- fixing error cases around icon setting (and allowing reset)
- making C++11
- abstracting a bit so future additions will be easier
- fixing non-xex uses

src/xenia/app/premake5.lua

@@ -25,7 +25,6 @@ project("xenia-app")
     "xenia-ui",
     "xenia-ui-gl",
     "xenia-vfs",
-    "xenia-xdbf",
   })
   flags({
     "WinMain",  -- Use WinMain instead of main.