reset upstream subtrees to yocto 2.6

Reset the following subtrees on thud HEAD:

poky: 87e3a9739d
meta-openembedded: 6094ae18c8
meta-security: 31dc4e7532
meta-ras

reset upstream subtrees to yocto 2.6

Reset the following subtrees on thud HEAD:

poky: 87e3a9739d
meta-openembedded: 6094ae18c8
meta-security: 31dc4e7532
meta-raspberrypi: a48743dc36
meta-xilinx: c42016e2e6

Also re-apply backports that didn't make it into thud:
poky:
17726d0 systemd-systemctl-native: handle Install wildcards

meta-openembedded:
4321a5d libtinyxml2: update to 7.0.1
042f0a3 libcereal: Add native and nativesdk classes
e23284f libcereal: Allow empty package
030e8d4 rsyslog: curl-less build with fmhttp PACKAGECONFIG
179a1b9 gtest: update to 1.8.1

Squashed OpenBMC subtree compatibility updates:
meta-aspeed:
Brad Bishop (1):
aspeed: add yocto 2.6 compatibility

meta-ibm:
Brad Bishop (1):
ibm: prepare for yocto 2.6

meta-ingrasys:
Brad Bishop (1):
ingrasys: set layer compatibility to yocto 2.6

meta-openpower:
Brad Bishop (1):
openpower: set layer compatibility to yocto 2.6

meta-phosphor:
Brad Bishop (3):
phosphor: set layer compatibility to thud
phosphor: libgpg-error: drop patches
phosphor: react to fitimage artifact rename

Ed Tanous (4):
Dropbear: upgrade options for latest upgrade
yocto2.6: update openssl options
busybox: remove upstream watchdog patch
systemd: Rebase CONFIG_CGROUP_BPF patch

Change-Id: I7b1fe71cca880d0372a82d94b5fd785323e3a9e7
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

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