layer.conf: Update to whinlatter release series

Since there are currently multiple breaking changes, update to a new
release series for the next release so layers can show compatibility
correctly.

(From OE-Core rev: 75eb26e71dba4096d5632b7f6b13db4f13aa6d7f)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-selftest/conf/layer.conf

@@ -11,4 +11,4 @@ BBFILE_PRIORITY_selftest = "5"
 
 addpylib ${LAYERDIR}/lib oeqa
 
-LAYERSERIES_COMPAT_selftest = "walnascar"
+LAYERSERIES_COMPAT_selftest = "whinlatter"

meta-skeleton/conf/layer.conf

@@ -14,4 +14,4 @@ LAYERVERSION_skeleton = "1"
 
 LAYERDEPENDS_skeleton = "core"
 
-LAYERSERIES_COMPAT_skeleton = "walnascar"
+LAYERSERIES_COMPAT_skeleton = "whinlatter"

meta/conf/layer.conf

@@ -7,12 +7,12 @@ BBFILE_COLLECTIONS += "core"
 BBFILE_PATTERN_core = "^${LAYERDIR}/"
 BBFILE_PRIORITY_core = "5"
 
-LAYERSERIES_CORENAMES = "walnascar"
+LAYERSERIES_CORENAMES = "whinlatter"
 
 # This should only be incremented on significant changes that will
 # cause compatibility issues with other layers
 LAYERVERSION_core = "15"
-LAYERSERIES_COMPAT_core = "walnascar"
+LAYERSERIES_COMPAT_core = "whinlatter"
 
 BBLAYERS_LAYERINDEX_NAME_core = "openembedded-core"