tools: Add missing stdio.h include to asm/bug.h header

We have a direct fprintf() call in the header, so we need stdio.h
include, otherwise it could fail compilation if there's no prior stdio.h
include directive.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/n/tip-8hvjgh24olfsa4non0a3ohnq@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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)