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/ltp/ltp/0001-netns_helper.sh-use-ping-6-when-ping6-is-not-avaliab.patch b/poky/meta/recipes-extended/ltp/ltp/0001-netns_helper.sh-use-ping-6-when-ping6-is-not-avaliab.patch
new file mode 100644
index 0000000..32e7a0e
--- /dev/null
+++ b/poky/meta/recipes-extended/ltp/ltp/0001-netns_helper.sh-use-ping-6-when-ping6-is-not-avaliab.patch
@@ -0,0 +1,45 @@
+From 76d8343ad300f6507233abcdf97629290e35848a Mon Sep 17 00:00:00 2001
+From: Lei Yang <Lei.Yang@windriver.com>
+Date: Wed, 29 Aug 2018 11:51:24 +0800
+Subject: [PATCH] netns_helper.sh: use 'ping -6' when ping6 is not avaliable
+
+ping6 has been merged into ping since 2015 by using "ping -6"
+in some distributions (e.g. OpenEmbedded) they dropped ping6 completely
+this patch will let both "ping -6" and ping6 work.
+
+[pvorel: change was done in s20150815:
+ebad35f ("ping: merge `ping6` command into `ping`"),
+before that release switch '-6' didn't exist.
+Upstream leaves ping6 symlink to distributions.]
+
+Upstream-Status: Backport
+[https://github.com/linux-test-project/ltp/commit/76d8343ad300f6507233abcdf97629290e35848a]
+
+Signed-off-by: Lei Yang <Lei.Yang@windriver.com>
+Signed-off-by: Petr Vorel <pvorel@suse.cz>
+Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
+---
+ testcases/kernel/containers/netns/netns_helper.sh | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/testcases/kernel/containers/netns/netns_helper.sh b/testcases/kernel/containers/netns/netns_helper.sh
+index 6aea10b..a9d0459 100755
+--- a/testcases/kernel/containers/netns/netns_helper.sh
++++ b/testcases/kernel/containers/netns/netns_helper.sh
+@@ -168,7 +168,12 @@ netns_setup()
+ 	ipv6)
+ 		IFCONF_IN6_ARG="inet6 add"
+ 		IP0=$6; IP1=$7;
+-		tping="ping6"; NETMASK=64
++		if which ping6 >/dev/null 2>&1; then
++		    tping="ping6"
++		else
++		    tping="ping -6"
++		fi
++		NETMASK=64
+ 		;;
+ 	*)
+ 		tst_brkm TBROK "second argument must be an ip version (ipv4|ipv6)"
+-- 
+2.7.4
+