Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/perf/util/values.c b/tools/perf/util/values.c
index 4b7a303..b9823f4 100644
--- a/tools/perf/util/values.c
+++ b/tools/perf/util/values.c
@@ -2,9 +2,10 @@
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <errno.h>
+#include <linux/zalloc.h>
 
-#include "util.h"
 #include "values.h"
 #include "debug.h"