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-core/psplash/psplash_git.bb b/poky/meta/recipes-core/psplash/psplash_git.bb
index aab2c03..3ad1ef4 100644
--- a/poky/meta/recipes-core/psplash/psplash_git.bb
+++ b/poky/meta/recipes-core/psplash/psplash_git.bb
@@ -73,6 +73,8 @@
 
 python do_compile () {
     import shutil
+    import subprocess
+    import shlex
 
     # Build a separate executable for each splash image
     workdir = d.getVar('WORKDIR')
@@ -82,8 +84,7 @@
     outputfiles = d.getVar('SPLASH_INSTALL').split()
     for localfile, outputfile in zip(localfiles, outputfiles):
         if localfile.endswith(".png"):
-            outp = oe.utils.getstatusoutput('%s %s POKY' % (convertscript, os.path.join(workdir, localfile)))
-            print(outp[1])
+            subprocess.call(shlex.split('%s %s POKY' % (convertscript, os.path.join(workdir, localfile))))
             fbase = os.path.splitext(localfile)[0]
             shutil.copyfile("%s-img.h" % fbase, destfile)
         else: