yocto-check-layer: Only note a layer without a conf/layer.conf (versus error)

Dynamic layers may have a conf directory, but don't need (or
want) a conf/layer.conf

This isn't an error, so we can just log it and indicate the
layer is being skipped.

A full layer without a conf file isn't all that useable, so we
aren't letting anything subtle slip through by just logging
it.

(From OE-Core rev: 9841a7c70bc21c5cd3bbea98d5f8654434577f61)

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/yocto-check-layer

@@ -112,7 +112,7 @@ def main():
                      % layer['name'])
             layers.remove(layer)
         elif layer['type'] == LayerType.ERROR_NO_LAYER_CONF:
-            logger.error("%s: Don't have conf/layer.conf file."\
+            logger.info("%s: Doesn't have conf/layer.conf file, so ignoring"\
                      % layer['name'])
             layers.remove(layer)
         else: