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-connectivity/python-pyro4/python-pyro4_4.63.bb b/meta-openembedded/meta-python/recipes-connectivity/python-pyro4/python-pyro4_4.63.bb
deleted file mode 100644
index 6f683e3..0000000
--- a/meta-openembedded/meta-python/recipes-connectivity/python-pyro4/python-pyro4_4.63.bb
+++ /dev/null
@@ -1,18 +0,0 @@
-SUMMARY = "Python Remote Objects"
-LICENSE = "MIT"
-LIC_FILES_CHKSUM = "file://LICENSE;md5=378acef375e17a3bff03bd0f78c53220"
-
-SRC_URI[md5sum] = "e1d772b67bf7c6f75fa3174bc95c8839"
-SRC_URI[sha256sum] = "67d2b34156619ba37e92100af95aade8129dd2b7327eb05821d43887451f7d7b"
-
-PYPI_PACKAGE = "Pyro4"
-
-inherit pypi setuptools
-
-RDEPENDS_${PN} += " \
-    ${PYTHON_PN}-logging \
-    ${PYTHON_PN}-selectors34 \
-    ${PYTHON_PN}-serpent \
-    ${PYTHON_PN}-threading \
-    ${PYTHON_PN}-zlib \
-    "
diff --git a/meta-openembedded/meta-python/recipes-connectivity/python-pyro4/python-pyro4_4.73.bb b/meta-openembedded/meta-python/recipes-connectivity/python-pyro4/python-pyro4_4.73.bb
new file mode 100644
index 0000000..88f5b18
--- /dev/null
+++ b/meta-openembedded/meta-python/recipes-connectivity/python-pyro4/python-pyro4_4.73.bb
@@ -0,0 +1,18 @@
+SUMMARY = "Python Remote Objects"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=cd13dafd4eeb0802bb6efea6b4a4bdbc"
+
+SRC_URI[md5sum] = "0375c061b93411feb86da01e801df888"
+SRC_URI[sha256sum] = "536b07a097d0619e7ab1effa3747fda177a24168d17a07a93ca9ac30977608f7"
+
+PYPI_PACKAGE = "Pyro4"
+
+inherit pypi setuptools
+
+RDEPENDS_${PN} += " \
+    ${PYTHON_PN}-logging \
+    ${PYTHON_PN}-selectors34 \
+    ${PYTHON_PN}-serpent \
+    ${PYTHON_PN}-threading \
+    ${PYTHON_PN}-zlib \
+    "