Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/include/asm/bug.h b/tools/include/asm/bug.h
index bbd75ac..550223f 100644
--- a/tools/include/asm/bug.h
+++ b/tools/include/asm/bug.h
@@ -3,6 +3,7 @@
 #define _TOOLS_ASM_BUG_H
 
 #include <linux/compiler.h>
+#include <stdio.h>
 
 #define __WARN_printf(arg...)	do { fprintf(stderr, arg); } while (0)