public static int w(String tag, Throwable tr) {
        return Log.w(tag, tr);
    }
Send a warning log message and log the exception.

@param tag Used to identify the source of a log message.  It usually identifies
           the class or activity where the log call occurs.
@param tr  An exception to log
replugin-plugin-library/replugin-plugin-lib/src/main/java/com/qihoo360/replugin/helper/LogRelease.java