package/libxml2: switch to https download

Signed-off-by: Daniel Lang <d.lang@abatec.at>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 4426874cd337e59db0fed846e625ba45a4fd43fe)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libxml2/libxml2.hash

@@ -1,4 +1,4 @@
-# From http://ftp.acc.umu.se/pub/gnome/sources/libxml2/2.10/libxml2-2.10.3.sha256sum
+# From https://download.gnome.org/sources/libxml2/2.10/libxml2-2.10.3.sha256sum
 sha256  5d2cc3d78bec3dbe212a9d7fa629ada25a7da928af432c93060ff5c17ee28a9c  libxml2-2.10.3.tar.xz
 # License files, locally calculated
 sha256  c5c63674f8a83c4d2e385d96d1c670a03cb871ba2927755467017317878574bd  Copyright

package/libxml2/libxml2.mk

@@ -8,7 +8,7 @@ LIBXML2_VERSION_MAJOR = 2.10
 LIBXML2_VERSION = $(LIBXML2_VERSION_MAJOR).3
 LIBXML2_SOURCE = libxml2-$(LIBXML2_VERSION).tar.xz
 LIBXML2_SITE = \
-	http://ftp.gnome.org/pub/gnome/sources/libxml2/$(LIBXML2_VERSION_MAJOR)
+	https://download.gnome.org/sources/libxml2/$(LIBXML2_VERSION_MAJOR)
 LIBXML2_INSTALL_STAGING = YES
 LIBXML2_LICENSE = MIT
 LIBXML2_LICENSE_FILES = Copyright