[package] uboot-envtools: update to v2013.07

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37857 3c298f89-4303-0410-b956-a3cf2f4a3e73
[package] uboot-imx6: update to v2013.07

Update includes upstream support for Wandboard Quad too.

Signed-off-by: Luka Perkov <luka@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37858 3c298f89-4303-0410-b956-a3cf2f4a3e73
imx6: add uboot-envtools to default packages

Signed-off-by: Luka Perkov <luka@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37859 3c298f89-4303-0410-b956-a3cf2f4a3e73