ibm: prepare for yocto 2.6

Set compatibility to thud for:
  meta-ibm
  meta-witherspoon
  meta-romulus
  meta-palmetto

React to 2.6 openssl packaging changes:
  s/openssl/openssl-bin

Change-Id: I1bf9bd9eeb112389759b7d0487f5c1d2cbd4c2a0
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-palmetto/conf/layer.conf b/meta-palmetto/conf/layer.conf
index 58de44f..61c7538 100644
--- a/meta-palmetto/conf/layer.conf
+++ b/meta-palmetto/conf/layer.conf
@@ -7,4 +7,4 @@
 
 BBFILE_COLLECTIONS += "palmetto-layer"
 BBFILE_PATTERN_palmetto-layer = ""
-LAYERSERIES_COMPAT_palmetto-layer = "sumo"
+LAYERSERIES_COMPAT_palmetto-layer = "thud"