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-extended/man-db/files/man_db.conf-avoid-multilib-install-file-conflict.patch b/poky/meta/recipes-extended/man-db/files/man_db.conf-avoid-multilib-install-file-conflict.patch
new file mode 100644
index 0000000..03273d3
--- /dev/null
+++ b/poky/meta/recipes-extended/man-db/files/man_db.conf-avoid-multilib-install-file-conflict.patch
@@ -0,0 +1,16 @@
+The first line of man_db.conf will be replaced by package name. And it causes
+multilib install file conflict. Remove the line to avoid the issue.
+
+Upstream-Status: Pending
+
+Signed-off-by: Kai Kang <kai.kang@windriver.com>
+
+diff --git a/src/man_db.conf.in b/src/man_db.conf.in
+index bc8bb7e..04cfb31 100644
+--- a/src/man_db.conf.in
++++ b/src/man_db.conf.in
+@@ -1,4 +1,3 @@
+-# @config_file_basename@
+ #
+ # This file is used by the man-db package to configure the man and cat paths.
+ # It is also used to provide a manpath for those without one by examining