Yocto 2.3

Move OpenBMC to Yocto 2.3(pyro).

Tested: Built and verified Witherspoon and Palmetto images
Change-Id: I50744030e771f4850afc2a93a10d3507e76d36bc
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Resolves: openbmc/openbmc#2461
diff --git a/import-layers/meta-openembedded/meta-oe/recipes-extended/p7zip/p7zip_16.02.bb b/import-layers/meta-openembedded/meta-oe/recipes-extended/p7zip/p7zip_16.02.bb
index fdd51db..67ffbc6 100644
--- a/import-layers/meta-openembedded/meta-oe/recipes-extended/p7zip/p7zip_16.02.bb
+++ b/import-layers/meta-openembedded/meta-oe/recipes-extended/p7zip/p7zip_16.02.bb
@@ -36,4 +36,4 @@
     chmod 0755 ${D}${bindir}/7z
 }
 
-BBCLASSEXTEND += "native"
+BBCLASSEXTEND = "native"