[PULL][yakkety] Switch to compressed Image on arm64

[Dann Frazier]

BugLink: http://bugs.launchpad.net/bugs/1384955

Building a 4.8-rc3+ kernel with the current Ubuntu config produces an image
too large for X-Gene/U-Boot systems. The compressed Image is about 1/3 the
size of the uncompressed Image, so switching to that will resolve the issue
with some growing room. And, obviously, it'll save disk space on all arm64
platforms.

UEFI can handle the compressed image just fine. xgene-uboot systems
(Mustang/McDivitt) can as well, as long as the uImage header has
the correct compression flags. Until recently, this was not the case.
uImages were always generated w/ compression=none flag. However, both
flash-kernel and debian-installer in yakkety have recently been updated to
dynamically detect the compression type and set the uImage flag correctly.
After some bake time, I plan to SRU that back into xenial to be ready
for hwe kernels.

The following changes since commit 7b77e0d5f133eddf7da7e042dbd4b91fbdb25a6c:

  UBUNTU: [Config] CONFIG_ARCH_ROCKCHIP=y for arm64 (2016-08-25 09:02:50 -0600)

are available in the git repository at:

  git://git.launchpad.net/~dannf/ubuntu/+source/linux/+git/yakkety arm64-zimage

for you to fetch changes up to ac7a01f271a4da2092735a0fe2308d3f5e41617a:

  UBUNTU: [Config] Switch to compressed Image on arm64 (2016-08-29
09:40:11 -0600)

----------------------------------------------------------------
dann frazier (1):
      UBUNTU: [Config] Switch to compressed Image on arm64

 debian.master/control.d/flavour-control.stub | 1 +
 debian.master/rules.d/arm64.mk               | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)