rg_scanner: fix linux aarch64 compile error

Author: Oleksiy-Yakovenko

plugins/rg_scanner/ebur128/ebur128.c

@@ -5,6 +5,7 @@
 #include <float.h>
 #include <limits.h>
 #include <math.h> /* You may have to define _USE_MATH_DEFINES if you use MSVC */
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>