bitbake: bb.utils: let loaded plugins provide a plugin object

This lets us avoid treating the module like an object, so no globals are
needed, if one chooses to do so.

(Bitbake rev: 71bfd5beb0d0ed88c7c14bbfd5ca1a1b56122bc1)

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/utils.py

@@ -1477,5 +1477,7 @@ def load_plugins(logger, plugins, pluginpath):
         if name != '__init__':
             plugin = load_plugin(name)
             if hasattr(plugin, 'plugin_init'):
-                plugin.plugin_init(plugins)
-            plugins.append(plugin)
+                obj = plugin.plugin_init(plugins)
+                plugins.append(obj or plugin)
+            else:
+                plugins.append(plugin)