grub-mkonfig: Look for Image-* on aarch64

Index: grub-2.02~beta2/util/grub.d/10_linux.in
===================================================================
--- grub-2.02~beta2.orig/util/grub.d/10_linux.in
+++ grub-2.02~beta2/util/grub.d/10_linux.in
@@ -168,6 +168,10 @@ case "x$machine" in
 	list=`for i in /boot/vmlinuz-* /vmlinuz-* /boot/kernel-* ; do
                   if grub_file_is_not_garbage "$i" ; then echo -n "$i " ; fi
               done` ;;
+    xaarch64)
+	list=`for i in /boot/Image-* /Image-* /boot/kernel-* ; do
+                  if grub_file_is_not_garbage "$i" ; then echo -n "$i " ; fi
+              done` ;;
     *) 
 	list=`for i in /boot/vmlinuz-* /boot/vmlinux-* /vmlinuz-* /vmlinux-* /boot/kernel-* ; do
                   if grub_file_is_not_garbage "$i" ; then echo -n "$i " ; fi