cdba-server: add CDBA-server banner to be output on startup

Granted all possible issues with SSH, especially in the remote and/or
proxied labs, and possible issues with the board being present but
failing to power up, it is useful to have a banner message once CDBA was
started. This gives user a clear picture that the connection is fine and
the server is trying to power up the board.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

cdba-server.c

@@ -356,6 +356,8 @@ int main(int argc, char **argv)
 
 	signal(SIGPIPE, sigpipe_handler);
 
+	fprintf(stderr, "Starting cdba server\n");
+
 	username = getenv("CDBA_USER");
 	if (!username)
 		username = getenv("USER");