gzip, diff, grub: bump versions

Patch by andrewma (closes #2754)

package/diffutils/diffutils.mk

@@ -3,9 +3,8 @@
 # diffutils
 #
 #############################################################
-DIFFUTILS_VERSION=2.8.7
+DIFFUTILS_VERSION=2.8.1
 DIFFUTILS_SOURCE:=diffutils-$(DIFFUTILS_VERSION).tar.gz
-#DIFFUTILS_SITE:=ftp://alpha.gnu.org/gnu/diffutils/
 DIFFUTILS_SITE:=$(BR2_GNU_MIRROR)/diffutils
 DIFFUTILS_CAT:=$(ZCAT)
 DIFFUTILS_DIR:=$(BUILD_DIR)/diffutils-$(DIFFUTILS_VERSION)

package/gzip/gzip.mk

@@ -3,9 +3,8 @@
 # gzip
 #
 #############################################################
-GZIP_VERSION:=1.3.5
+GZIP_VERSION:=1.3.12
 GZIP_SOURCE:=gzip-$(GZIP_VERSION).tar.gz
-#GZIP_SITE:=ftp://alpha.gnu.org/gnu/gzip
 GZIP_SITE:=$(BR2_GNU_MIRROR)/gzip
 GZIP_DIR:=$(BUILD_DIR)/gzip-$(GZIP_VERSION)
 GZIP_CAT:=$(ZCAT)

target/x86/grub/grub.mk

@@ -21,9 +21,9 @@ ifeq ($(GRUB_SUPPORTED_ARCH),y)
 #
 #############################################################
 GRUB_SOURCE:=grub_0.97.orig.tar.gz
-GRUB_PATCH:=grub_0.97-31.diff.gz
+GRUB_PATCH:=grub_0.97-35.diff.gz
 GRUB_SITE=$(BR2_DEBIAN_MIRROR)/debian/pool/main/g/grub
-GRUB_PATCH_SITE:=$(BR2_DEBIAN_MIRROR)/debian/pool/main/g/grub
+GRUB_PATCH_SITE:=$(GRUB_SITE)
 GRUB_CAT:=$(ZCAT)
 GRUB_DIR:=$(BUILD_DIR)/grub-0.97
 GRUB_BINARY:=grub/grub