Extend the size limit for kernel image, from 2097080 to 2729712.
This will break a few qnap devices, but keep other armel devices
running.
Also revert two commits that disabled armel previously:
- [2ed70eb] "Add empty featuresets for armel to help abiupdate script"
- [5f62872] "(Temporarily) disable armel kernel image build"
The armel/marvell kernel size is growing to large and the compressed
image is over the limit.
Given the armel architecture will most likely not be part of Buster,
disable the image build.
Cf. https://lists.debian.org/debian-kernel/2018/01/msg00278.html
Use kernel-wedge in gencontrol.py and during the build process to
generate the udeb packages required by debian-installer.
Add the kernel-wedge configuration files from all the current
linux-kernel-di-$arch-2.6 packages.
svn path=/dists/trunk/linux-2.6/; revision=18121