So far, we remove the old and copy a fresh new OpenWrt directory
into the build directory on prepare. There is no need to do this,
as OpenWrt/Make is capable of detecting changes and we do properly
update the feeds and patches already.
So, just clone the OpenWrt main repo into builddir directly, and
just checkout/apply patches during prepare.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Some time ago, the firmware created a directory for each target
and built OpenWrt separately there. In this situation, it made
sense to download files only once and share them between these
build directories.
However, since we nowadays only have one build directory for all
targets, this makes no sense anymore. Remove the link.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>