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/bitbake/lib/ply/yacc.py b/poky/bitbake/lib/ply/yacc.py
index d50886e..561784f 100644
--- a/poky/bitbake/lib/ply/yacc.py
+++ b/poky/bitbake/lib/ply/yacc.py
@@ -488,7 +488,7 @@
                     # --! DEBUG
                     return result
 
-            if t == None:
+            if t is None:
 
                 # --! DEBUG
                 debug.error('Error  : %s',
@@ -766,7 +766,7 @@
                     n = symstack[-1]
                     return getattr(n,"value",None)
 
-            if t == None:
+            if t is None:
 
                 # We have some kind of parsing error here.  To handle
                 # this, we are going to push the current token onto
@@ -1021,7 +1021,7 @@
                     n = symstack[-1]
                     return getattr(n,"value",None)
 
-            if t == None:
+            if t is None:
 
                 # We have some kind of parsing error here.  To handle
                 # this, we are going to push the current token onto