signature file echo update

mobile/signature.php

@@ -12,7 +12,7 @@ $addr = $_SERVER['REMOTE_ADDR'];
 Log::record("request ip:{$addr}",Log::DEBUG);
 Log::record("signature data : {$data}",Log::DEBUG);
 Log::record("HTTP_SIGN : {$sign}",Log::DEBUG);
-echo ('success');
+echo ('SUCCESS');
 
 //echo("{$echostr}");
 //