package/aufs-util: use HTTPS for git.code.sf.net

git.code.sf.net is available over HTTPS, so use that for security and
consistency with the other packages.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 99d525028f969220719a4e6bcd694f7d9cfd5b67)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/aufs-util/aufs-util.mk

@@ -6,7 +6,7 @@
 
 # linux-headers
 AUFS_UTIL_VERSION = $(call qstrip,$(BR2_PACKAGE_AUFS_UTIL_VERSION))
-AUFS_UTIL_SITE = http://git.code.sf.net/p/aufs/aufs-util
+AUFS_UTIL_SITE = https://git.code.sf.net/p/aufs/aufs-util
 AUFS_UTIL_SITE_METHOD = git
 AUFS_UTIL_LICENSE = GPL-2.0
 AUFS_UTIL_LICENSE_FILES = COPYING