Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/perf/util/block-range.c b/tools/perf/util/block-range.c
index f1451c9..1be4326 100644
--- a/tools/perf/util/block-range.c
+++ b/tools/perf/util/block-range.c
@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "block-range.h"
 #include "annotate.h"
+#include <assert.h>
+#include <stdlib.h>
 
 struct {
 	struct rb_root root;