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/poky/meta/recipes-devtools/python/python-gitdb.inc b/poky/meta/recipes-devtools/python/python-gitdb.inc
index 2d5292e..789ab95 100644
--- a/poky/meta/recipes-devtools/python/python-gitdb.inc
+++ b/poky/meta/recipes-devtools/python/python-gitdb.inc
@@ -8,8 +8,8 @@
 
 PYPI_PACKAGE = "gitdb2"
 
-SRC_URI[md5sum] = "d5217eb94ebd36fcec62b929d1f72b00"
-SRC_URI[sha256sum] = "b60e29d4533e5e25bb50b7678bbc187c8f6bcff1344b4f293b2ba55c85795f09"
+SRC_URI[md5sum] = "6e21f5795a204f7afecb0a72fff66932"
+SRC_URI[sha256sum] = "bb4c85b8a58531c51373c89f92163b92f30f81369605a67cd52d1fc21246c044"
 
 DEPENDS = "${PYTHON_PN}-async ${PYTHON_PN}-setuptools-native ${PYTHON_PN}-smmap"