include <sys/sysmacros.h> for major/minor defintions

Fixes

| ../blktool-4.orig/blktool.c: In function 'detect_dev_class':
| ../blktool-4.orig/blktool.c:295:10: warning: implicit declaration of function 'major' [-Wimplicit-function-declaration]
|   switch (major(st_rdev)) {
|           ^~~~~

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Index: blktool-4.orig/blktool.c
===================================================================
--- blktool-4.orig.orig/blktool.c
+++ blktool-4.orig/blktool.c
@@ -27,6 +27,7 @@
 #include <linux/cdrom.h>
 #include <linux/major.h>
 #include <scsi/scsi.h>
+#include <sys/sysmacros.h>
 
 #include "blktool.h"