Add missing include

Change-Id: I9fc3ebf60b98760611ac2071c7c519a0f8326341
diff --git a/media/libmedia/MemoryLeakTrackUtil.cpp b/media/libmedia/MemoryLeakTrackUtil.cpp
index f004ca4..66f7161 100644
--- a/media/libmedia/MemoryLeakTrackUtil.cpp
+++ b/media/libmedia/MemoryLeakTrackUtil.cpp
@@ -17,6 +17,7 @@
 #include <media/MemoryLeakTrackUtil.h>
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <sys/types.h>
 #include <unistd.h>