File _servicedata of Package libsrtp2-linphone

<servicedata>
    <service name="tar_scm">
        <param name="url">https://gitlab.linphone.org/BC/public/external/srtp.git</param>
        <param name="changesrevision">662694f73483d5c510f6ae5e0d15a5f6f3dfb7fd</param>
    </service>
</servicedata>