datapath-windows: Ignore VStudio 2015 temporary files

Ignore the temporary files created by Visual Studio 2015 when opening
a solution.

Signed-off-by: Alin Gabriel Serdean <aserdean@cloudbasesolutions.com>
Acked-by: Sairam Venugopal <vsairam@vmware.com>
Signed-off-by: Gurucharan Shetty <guru@ovn.org>

Author: Alin Serdean

datapath-windows/.gitignore

@@ -1,4 +1,6 @@
 /Package/x64/
+*.db
+*.opendb
 *.opensdf
 *.sdf
 /ovsext/x64/