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>
diff --git a/meta-openembedded/meta-python/recipes-devtools/python/python-pybind11.inc b/meta-openembedded/meta-python/recipes-devtools/python/python-pybind11.inc
index e441dc6..1722875 100644
--- a/meta-openembedded/meta-python/recipes-devtools/python/python-pybind11.inc
+++ b/meta-openembedded/meta-python/recipes-devtools/python/python-pybind11.inc
@@ -3,5 +3,5 @@
 LICENSE = "BSD-2-Clause"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=beb87117af69fd10fbf9fb14c22a2e62"
 
-SRC_URI[md5sum] = "2c651a75a20dabbaa18a8b023ffd54c0"
-SRC_URI[sha256sum] = "cbb036a8aad59a199ad672f98813f85c672642c6a67b4ff3868b1d6abc5fae3e"
+SRC_URI[md5sum] = "5b9611041e4ea66b2b919239e3bacd65"
+SRC_URI[sha256sum] = "87ff3ae777d9326349af5272974581270b2a0909b2392dc0cc57eb28ce23bcc3"