meta-openembedded and poky: subtree updates

Squash of the following due to dependencies among them
and OpenBMC changes:

meta-openembedded: subtree update:d0748372d2..9201611135
meta-openembedded: subtree update:9201611135..17fd382f34
poky: subtree update:9052e5b32a..2e11d97b6c
poky: subtree update:2e11d97b6c..a8544811d7

The change log was too large for the jenkins plugin
to handle therefore it has been removed. Here is
the first and last commit of each subtree:

meta-openembedded:d0748372d2
      cppzmq: bump to version 4.6.0
meta-openembedded:17fd382f34
      mpv: Remove X11 dependency
poky:9052e5b32a
      package_ipk: Remove pointless comment to trigger rebuild
poky:a8544811d7
      pbzip2: Fix license warning

Change-Id: If0fc6c37629642ee207a4ca2f7aa501a2c673cd6
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/poky/meta/lib/oeqa/controllers/masterimage.py b/poky/meta/lib/oeqa/controllers/masterimage.py
index 0435dfa..0bf5917 100644
--- a/poky/meta/lib/oeqa/controllers/masterimage.py
+++ b/poky/meta/lib/oeqa/controllers/masterimage.py
@@ -97,7 +97,7 @@
         if self.powercontrol_cmd:
             cmd = "%s %s" % (self.powercontrol_cmd, msg)
             try:
-                commands.runCmd(cmd, assert_error=False, preexec_fn=os.setsid, env=self.origenv)
+                commands.runCmd(cmd, assert_error=False, start_new_session=True, env=self.origenv)
             except CommandError as e:
                 bb.fatal(str(e))