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/lib/oeqa/sdk/utils/sdkbuildproject.py b/poky/meta/lib/oeqa/sdk/utils/sdkbuildproject.py
index 4e25114..6fed73e 100644
--- a/poky/meta/lib/oeqa/sdk/utils/sdkbuildproject.py
+++ b/poky/meta/lib/oeqa/sdk/utils/sdkbuildproject.py
@@ -20,10 +20,9 @@
         BuildProject.__init__(self, uri, foldername, tmpdir=testpath, dl_dir=dl_dir)
 
     def download_archive(self):
-
         self._download_archive()
 
-        cmd = 'tar xf %s%s -C %s' % (self.targetdir, self.archive, self.targetdir)
+        cmd = 'tar xf %s -C %s' % (os.path.join(self.targetdir, self.archive), self.targetdir)
         subprocess.check_output(cmd, shell=True)
 
         #Change targetdir to project folder
@@ -42,4 +41,9 @@
 
     def _run(self, cmd):
         self.log("Running . %s; " % self.sdkenv + cmd)
-        return subprocess.call(". %s; " % self.sdkenv + cmd, shell=True)
+        try:
+            output = subprocess.check_output(". %s; " % self.sdkenv + cmd, shell=True, stderr=subprocess.STDOUT)
+        except subprocess.CalledProcessError as exc:
+            print(exc.output.decode('utf-8'))
+            return exc.returncode
+        return 0