lavc/libx264: remap X264_LOG_INFO loglevel from AV_LOG_INFO to VERBOSE

AV_LOG_INFO is more geared towards messages to be read by the user, the
statistics shown by libx264 with X264_LOG_INFO are more useful at the
debugging level.

Help reducing the log spam.

libavcodec/libx264.c

@@ -79,7 +79,7 @@ static void X264_log(void *p, int level, const char *fmt, va_list args)
     static const int level_map[] = {
         [X264_LOG_ERROR]   = AV_LOG_ERROR,
         [X264_LOG_WARNING] = AV_LOG_WARNING,
-        [X264_LOG_INFO]    = AV_LOG_INFO,
+        [X264_LOG_INFO]    = AV_LOG_VERBOSE,
         [X264_LOG_DEBUG]   = AV_LOG_DEBUG
     };