Add Coverity Scan badge
# SoftEther VPN
-[![AppVeyor build status](https://ci.appveyor.com/api/projects/status/github/softethervpn/softethervpn?branch=master&svg=true)](https://ci.appveyor.com/project/softethervpn/softethervpn) [![Travis CI build status](https://travis-ci.org/SoftEtherVPN/SoftEtherVPN.svg?branch=master)](https://travis-ci.org/SoftEtherVPN/SoftEtherVPN)
+[![AppVeyor build status](https://ci.appveyor.com/api/projects/status/github/softethervpn/softethervpn?branch=master&svg=true)](https://ci.appveyor.com/project/softethervpn/softethervpn) [![Travis CI build status](https://travis-ci.org/SoftEtherVPN/SoftEtherVPN.svg?branch=master)](https://travis-ci.org/SoftEtherVPN/SoftEtherVPN) [![Coverity Scan Build Status](https://scan.coverity.com/projects/16304/badge.svg)](https://scan.coverity.com/projects/softethervpn-softethervpn)
- [SoftEther VPN](#softether-vpn)
- [BOARD MEMBERS OF THIS REPOSITORY](#board-members-of-this-repository)
