grub: fix build

Revert to the -35 debian patch (from stable.debian.net) so the other
patches apply, E.G. effectively revert r23968.

Someone who actually uses grub should probably look into updating our
version.

target/x86/grub/grub.mk

@@ -21,8 +21,8 @@ ifeq ($(GRUB_SUPPORTED_ARCH),y)
 #
 #############################################################
 GRUB_SOURCE:=grub_0.97.orig.tar.gz
-GRUB_PATCH:=grub_0.97-51.diff.gz
-GRUB_SITE=$(BR2_DEBIAN_MIRROR)/debian/pool/main/g/grub
+GRUB_PATCH:=grub_0.97-35.diff.gz
+GRUB_SITE:=http://snapshot.debian.net/archive/2008/03/29/debian/pool/main/g/grub/
 GRUB_PATCH_SITE:=$(GRUB_SITE)
 GRUB_CAT:=$(ZCAT)
 GRUB_DIR:=$(BUILD_DIR)/grub-0.97