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/yocto-poky/meta/conf/abi_version.conf b/import-layers/yocto-poky/meta/conf/abi_version.conf
index a829687..4964880 100644
--- a/import-layers/yocto-poky/meta/conf/abi_version.conf
+++ b/import-layers/yocto-poky/meta/conf/abi_version.conf
@@ -4,4 +4,4 @@
 # that breaks the format and have been previously discussed on the mailing list 
 # with general agreement from the core team.
 #
-OELAYOUT_ABI = "11"
+OELAYOUT_ABI = "12"