Added Visual Studio 2015 Update 2 files to gitignore

Merged pull request #1186.
Thanks to @secretdataz

.gitignore

@@ -100,6 +100,7 @@ Thumbs.db
 
 # /vcproj-14/
 .vs
+*.VC.db
 /vcproj-14/char-server
 /vcproj-14/login-server
 /vcproj-14/mapcache