bump(coreos-base/cros-devutils): Update to latest platform/dev

Includes bump of gmerge for the sake of keeping things in sync.
bump(coreos-base/update_engine): New update_engine, no more metrics.

This update removes the dependency on the ChromeOS metrics library that
we never made use of in CoreOS.
Merge pull request #655 from marineam/updates

Updates
bump(coreos-base/coreos-init): ssh-keygen and motdgen.service fixes

fix(sshd_keygen): Generate all key types
feat(motdgen): Ensure that motdgen runs after locksmith starts
Merge pull request #656 from crawford/init

bump(coreos-base/coreos-init): ssh-keygen and motdgen.service fixes
fix(profiles): Update to openssl-1.0.1h

https://bugs.gentoo.org/show_bug.cgi?id=512506
Merge pull request #657 from philips/openssl-1.0.1h

fix(profiles): Update to openssl-1.0.1h
fix(fleet): shut down etcd after fleet

fleet needs to write to etcd while gracefully shutting
down, which typically requires the etcd unit to be
active locally. Define this relation explicitly in
the fleet unit with an After=etcd.service option.
Merge pull request #658 from bcwaldon/etcd-ordering

fix(fleet): shut down etcd after fleet
bump(app-admin/locksmith): Update to locksmith v0.1.3
Merge pull request #659 from crawford/locksmith

bump(app-admin/locksmith): Update to locksmith v0.1.3
bump(coreos-cloudinit): upgrade to v0.7.5
Merge pull request #660 from jonboulle/cloudinit

bump(coreos-cloudinit): upgrade to v0.7.5
bump(app-emulation/docker): v0.12
chore(app-emulation): remove unused patches

These have all been merged upstream.
Merge pull request #663 from philips/docker-0.12

bump(app-emulation/docker): v0.12
bump(coreos-base/coreos-cloudinit): update to 0.7.6
Merge pull request #664 from marineam/cloud

bump(coreos-base/coreos-cloudinit): update to 0.7.6
bump(dev-db/etcd): v0.4.3
bump(dev-db/etcdctl): bump to 0.4.3