Add minimal OEM packages for Azure and Hyper-V

We can now can generate images for Azure/Hyper-V, add basic cloud config
to generate /etc/oem-release to identify these images. The Azure images
still lack support for the agent required in that environment.
Merge pull request #863 from marineam/oem

Add minimal OEM packages for Azure and Hyper-V
docker: wait for docker.socket to fix race in docker.service
app-shells/bash: bump to 4.2_p48

Fixes a remote code execution exploit.
http://seclists.org/oss-sec/2014/q3/649
Merge pull request #868 from crawford/bash

app-shells/bash: bump to 4.2_p48
Merge pull request #866 from eyakubovich/master

docker: wait for docker.socket to fix race in docker.service
coreos-kernel: enable support for using ipset with iptables

We enabled ipset support a while back but missed NETFILTER_XT_SET which
is needed for using ipsets in iptables rules. Enable a few other
iptables options we were missing just in case someone wants them.
Merge pull request #869 from marineam/ipset

coreos-kernel: enable support for using ipset with iptables
Propagate $PVR to the oem-*/files/cloud-config.yml files as version-id
coreos-kernel: enable AACRAID and AIC94XX SCSI drivers
Merge pull request #870 from marineam/scsi

coreos-kernel: enable AACRAID and AIC94XX SCSI drivers
vboot_reference: fix cgpt with cciss block devices
app-shells/bash: sync ebuild and patches
Merge pull request #867 from vcaputo/oem_version

Propagate $PVR to the oem-*/files/cloud-config.yml files as version-id
Merge pull request #871 from marineam/cgpt

vboot_reference: fix cgpt with cciss block devices
Merge pull request #872 from crawford/bash

app-shells/bash: sync ebuild and patches
Update update_engine ebuild for oemversion support
coreos-base/oem-digitalocean: use --oem flag
coreos-base/oem-ec2-compat: use --oem flag
coreos-base/oem-rackspace-onmetal: use --oem flag