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/scripts/gen-lockedsig-cache b/poky/scripts/gen-lockedsig-cache
index 9bfae9d..cd8f9a4 100755
--- a/poky/scripts/gen-lockedsig-cache
+++ b/poky/scripts/gen-lockedsig-cache
@@ -78,11 +78,15 @@
 sstate_content_cache = {}
 for s in sigs:
     prefix = s[:2]
+    prefix2 = s[2:4]
     if prefix not in sstate_content_cache:
-        sstate_content_cache[prefix] = build_sha_cache(prefix)
+        sstate_content_cache[prefix] = {}
+    if prefix2 not in sstate_content_cache[prefix]:
+        sstate_content_cache[prefix][prefix2] = build_sha_cache(prefix + "/" + prefix2)
 
-    for f in sstate_content_cache[prefix][s]:
-        files.add(f)
+    if s in sstate_content_cache[prefix][prefix2]:
+        for f in sstate_content_cache[prefix][prefix2][s]:
+            files.add(f)
 
 elapsed = time.perf_counter() - start_time
 print("Gathering file list took %.1fs" % elapsed)