Updated clone depth for appveyor

We disabled rolling builds now(appveyor server side setting) so it does not look like our commits where failing the build tests anymore.

appveyor.yml

@@ -2,7 +2,7 @@ image: Visual Studio 2015
 # This is the default location, but we put it here for safety reasons, since we use it in our test script
 clone_folder: c:\projects\rathena
 # We do not need the git history for our integration tests
-clone_depth: 1
+clone_depth: 50
 version: '{branch}-{build}'
 pull_requests:
   do_not_increment_build_number: true