Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/perf/util/path.h b/tools/perf/util/path.h
index f014f90..083429b 100644
--- a/tools/perf/util/path.h
+++ b/tools/perf/util/path.h
@@ -2,6 +2,9 @@
 #ifndef _PERF_PATH_H
 #define _PERF_PATH_H
 
+#include <stddef.h>
+#include <stdbool.h>
+
 struct dirent;
 
 int path__join(char *bf, size_t size, const char *path1, const char *path2);