libsemanage: change to github location

The old location doesn't seem active any more. Even though this github URL
looks a bit odd, it is linked from
https://github.com/SELinuxProject/selinux/wiki/Releases

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libsemanage/libsemanage.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 LIBSEMANAGE_VERSION = 2.1.10
-LIBSEMANAGE_SITE = http://userspace.selinuxproject.org/releases/20130423/
+LIBSEMANAGE_SITE = https://raw.githubusercontent.com/wiki/SELinuxProject/selinux/files/releases/20130423
 LIBSEPOL_LICENSE = LGPLv2.1+
 LIBSEPOL_LICENSE_FILES = COPYING