coreos-kernel: Adding MMC/SDHCI drivers

Adding the generic MMC driver as well as the corresponding SDCHI
components.  This will allow access for hardware which utilizes
MMC, SD, & SDHCI devices often used in embedded systems and for
emergency recovery partitions.
Merge pull request #908 from brianredbeard/mmc-sd-driver

coreos-kernel: Adding MMC/SDHCI drivers
coreos-kernel: enable Ceph FS
locksmith: Stop leaking dbus.Conn in etcdActive

Fixes ooms in locksmithd.
Merge pull request #913 from vcaputo/locksmith_019

locksmith: Stop leaking dbus.Conn in etcdActive
app-emulation/wa-linux-agent: bump agent and allow config of 'core'

Patches have been merged upstream. Add a special case for 'core' user, allowing
the agent to configure it.
coreos-base/oem-azure: use cloud-init --oem flag
coreos-base/coreos-cloudinit: bump to v0.10.6
Merge pull request #915 from crawford/cloudinit

coreos-base/coreos-cloudinit: bump to v0.10.6
Merge pull request #911 from crawford/waagent

azure: update wa-linux-agent
update_engine: support disabling kexec on any platform
Merge pull request #916 from marineam/nokexec

update_engine: support disabling kexec on any platform
Merge pull request #906 from carmstrong/enable_cephfs

coreos-kernel: enable Ceph FS
Supply "-extldflags -fno-PIC" to locksmith GOLDFLAGS on hardened gcc

A similar workaround is utilized in the docker ebuild, see:
https://bugs.gentoo.org/show_bug.cgi?id=493328
Merge pull request #917 from vcaputo/locksmith_hardened_gcc_workaround

Supply "-extldflags -fno-PIC" to locksmith GOLDFLAGS on hardened gcc
Revert to 0.1.8 pre sync with upstream godbus/go-systemd

Leak returned with upstream changes.
Merge pull request #918 from vcaputo/revert_018git

Revert to 0.1.8 pre sync with upstream godbus/go-systemd
profiles: OpenSSL 1.0.1j
Merge pull request #919 from marineam/openssl

profiles: OpenSSL 1.0.1j
bootengine: supply acpi_rsdp to kexec on efi systems