build-emulator-sdcard.sh: disabling powerd, unity8 and enabling ssh

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
get-tarball-url.py: use devel-proposed by default until the emulator is stable enough
run-emulator.sh: using skin WVGA800 by default

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
run-emulator.sh: temporarily forcing 32bits and using cortex-a9 by default
build-emulator-sdcard.sh: setting up static network and disabling core services

Disabling core-services until the emulator is somehow stable. It's quite
easy to hang the emulator currently, so it needs further debugging.

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
build-emulator-sdcard.sh: disabling hud voice recognition

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
run-emulator.sh: also setting skindir

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
Use base 512 sizes for ubuntu-system.img & sdcard.img. (off by one)

Signed-off-by: Dmitrijs Ledkovs <dmitrijs.ledkovs@canonical.com>
run-emulator.sh: adding support for disk snapshots

Patch by Jamie Strandboge, bug http://pad.lv/1253802

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
generic: reducing system and userdata image sizes

We don't need much for the Ubuntu Touch image.

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
core/Makefile: allow ota packages for goldfish

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
ota_from_target_files: adding option to skip boot.img flashing in OTA images

This is useful for devices that still want to use OTA but can't
necessarily update the bootimage via the OTA flashing mechanisms.
One simple example is the emulator/goldfish.

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
core/Makefile: adding support for the skip_bootimg cmdline argument in ota images

By default it's false, and also make it true for goldfish so we can get
an OTA image for it.

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
build: also using sparse images for goldfish

So we can share the same code path at the system-image server, and also
have a reduced image as part of the ubuntu android package.

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
Merge remote-tracking branch 'phablet/phablet-trusty' into ubuntu-touch-vision