fix(coreos): Get version from manifest, export COREOS_ names

The version will now be tracked in the manifest so the old
coreos_version.sh needs to source it from there. Also export variables
with a COREOS_ prefix in addition to CHROMEOS_ since the latter name
isn't really correct. This is particularly true for the data published
via lsb_release.
Merge pull request #47 from marineam/version

fix(coreos): Get version from manifest, export COREOS_ names
fix(config): Remove make.conf options that duplicate profile defaults.

We were already using the default for CFLAGS, etc. LDFLAGS had
--as-needed but that has gone into the default Gentoo profile so we
ought to move it there as well. Also, ld's -O1 and -O2 are equivalent so
use the profile default -O1.
fix(config): Move USE_PYTHON into profiles.

Unlikely this is actually needed right now but it isn't hurting either.
Will remove it once we move to Python 2.7.
fix(config): Update the SDK make.conf to refer to the current version.

This means that we will always get the correct set of binary packages
for our current manifest version.
fix(cros_sdk): Update default SDK tarball version.

Update to latest release. cros_sdk is still using this file instead of
version.txt in the manifest because it needs a tarball that already
exists when building a new version for the first time. At some point
that will work differently but for now we'll have to keep this file.
Merge pull request #48 from marineam/updates

Updates and cleanups, use new release for binary packges
chore(coreos-init): mv update-engine.service into update_engine ebuild

move the service file to the ebuild where it belongs.
feat(update_engine): restart a second after death

It is possible that update_engine will crash. Try to recover by
restarting the update_engine but wait some seconds first.
Merge pull request #49 from philips/restart-update-engine-on-failure

Restart update engine on failure
feat(coreos-au-key): add an ebuild to put dev keys on image

This places a dev signing key on disk for testing purposes. As noted in
the ebuild a production key will replace this key when building official
images.
fix(profiles): Apply the bindist flag to both the SDK and targets

Previously only targets were being built with bindist but we should
build the SDK with it as well. This avoids the re-compile of openssl,
openssh, and freetype when creating a new chroot since the SDK tarballs
are already built with the bindist flag. Also turn the bindist flag back
on for freetype in the target profile, we don't need ClearType sub-pixel
rendering on our systems. :)
fix(config): Use official release packages for targets.

We now build target packages!
Merge pull request #50 from philips/add-coreos-au-key-ebuild

feat(coreos-au-key): add an ebuild to put dev keys on image
Merge pull request #51 from marineam/bindist

fix(profiles): Apply the bindist flag to both the SDK and targets
Merge pull request #52 from marineam/packages

fix(config): Use official release packages for targets.
fix(coreos-au-key): copy the public key explicitly

The public key wasn't getting put in the right spot. Copy it explicitly
to fix.
feat(update_engine): add reboot manager experiment

Eventually this will talk to the API and coordinate with the rest of the
host group but for now lets right a bash script and reboot in 60
seconds.
Merge pull request #53 from philips/add-reboot-manager

feat(update_engine): add reboot manager experiment
feat(profiles): Add lbzip2 to base system package set

lbzip2 is surprisingly fast and is particularly useful for dealing with
large archives and filesystem images. In a similar vein pbzip2 has been
used for handling binary packages for a while but lbzip2 seems a bit
better. Since I plan on using the heck out of lbzip2 add it to the build
and system package sets. While mucking around might as well start
swapping pbzip2 for lbzip2 for consistency's sake although it doesn't
seem to matter much for binary packages. For now we can only switch
make.conf for targets, the host make.conf can't change till everyone's
SDK has lbzip2 installed.