Merge lp://staging/~manjo/ubuntu/trusty/flash-kernel/filter-useable-kernels into lp://staging/ubuntu/trusty/flash-kernel

Submitting merge proposal for smoser's patch to filter useable kernels for platform. Currently if the platform uses flavor kernels, and the cloud image has a -generic version that is newer than the flavor version, nothing gets installed and boot.scr is not generated. With this patch, the latest useable flavor kernel is discovered and written to /boot and boot.scr is generated.

=== Testing ===
+ basename /usr/sbin/flash-kernel
+ self=flash-kernel
+ mktemp -dt flash-kernel.XXXXXXXX
+ tmpdir=/tmp/flash-kernel.YDX2TwaC
+ kernel=/boot/vmlinuz-3.13.0-9-keystone
+ initrd=/boot/initrd.img-3.13.0-9-keystone
+ [ -n /boot/boot.scr ]
+ boot_script_path=//boot/boot.scr
+ boot_script=/usr/share/flash-kernel/bootscript/bootscr.keystone2
+ mkimage_script 0x0 boot script /usr/share/flash-kernel/bootscript/bootscr.keystone2 /tmp/flash-kernel.YDX2TwaC/boot.scr
+ local saddr=0x0
+ local sdesc=boot script
+ local sdata=/usr/share/flash-kernel/bootscript/bootscr.keystone2
+ local script=/tmp/flash-kernel.YDX2TwaC/boot.scr
+ basename /usr/share/flash-kernel/bootscript/bootscr.keystone2
+ local tdata=/tmp/flash-kernel.YDX2TwaC/bootscr.keystone2
+ mktemp --tmpdir=/tmp/flash-kernel.YDX2TwaC
+ local ubootenv=/tmp/flash-kernel.YDX2TwaC/tmp.roGZAJGKP2
+ gen_ubootenv
+ ENVSTUBDIRS=/etc/flash-kernel/ubootenv.d /usr/share/flash-kernel/ubootenv.d
+ LC_ALL=C+ sortfind -u
 /etc/flash-kernel/ubootenv.d /usr/share/flash-kernel/ubootenv.d -type f -regex .*/[0-9a-zA-Z_-]+ -printf %f\n
+ ENVSTUBS=
+ printf Generating boot script u-boot image...
Generating boot script u-boot image... + sed -e /@@UBOOT_ENV_EXTRA@@/{
  s/@@UBOOT_ENV_EXTRA@@//g
  r /tmp/flash-kernel.YDX2TwaC/tmp.roGZAJGKP2
  }
+ mkimage -A arm -O linux -T script -C none -a 0x0 -e 0x0 -n boot script -d /tmp/flash-kernel.YDX2TwaC/bootscr.keystone2 /tmp/flash-kernel.YDX2TwaC/boot.scr
+ echo done.
done.
+ boot_script=/tmp/flash-kernel.YDX2TwaC/boot.scr
+ backup_and_install /tmp/flash-kernel.YDX2TwaC/boot.scr //boot/boot.scr
+ local source=/tmp/flash-kernel.YDX2TwaC/boot.scr
+ local dest=//boot/boot.scr
+ [ -e //boot/boot.scr ]
+ basename //boot/boot.scr
+ echo Installing new boot.scr.
Installing new boot.scr.
+ mv /tmp/flash-kernel.YDX2TwaC/boot.scr //boot/boot.scr
+ cleanups
+ rm -rf /tmp/flash-kernel.YDX2TwaC
+ [ -d ]

root@lazy:/# ls /boot
abi-3.13.0-34-generic-lpae initrd.img-3.13.0-34-generic-lpae
abi-3.13.0-9-keystone initrd.img-3.13.0-9-keystone
boot.scr System.map-3.13.0-34-generic-lpae
config-3.13.0-34-generic-lpae System.map-3.13.0-9-keystone
config-3.13.0-9-keystone vmlinuz-3.13.0-34-generic-lpae
grub vmlinuz-3.13.0-9-keystone