version.mk: add initial infrastructure for recording specific build taint conditions like modified busybox or disabled ipv6 support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39436 3c298f89-4303-0410-b956-a3cf2f4a3e73
base-files: expose taint flags in /etc/openwrt_release

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39437 3c298f89-4303-0410-b956-a3cf2f4a3e73
sunxi: boot changes
 - Added uEnv.txt to facilitate automatic boot.
 - Cosmetic fix in u-boot Makefile
 - Don't force command line arguments

Signed-off-by: Zalan Blenessy <zalan.blenessy@gmail.com>
Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39438 3c298f89-4303-0410-b956-a3cf2f4a3e73