bitbake/event/ast: Add RecipePreFinalise event

One of the implications is we need to register the event handlers before
executing the anonymous python functions. I can't find any issue with making
that change in any existing metadata use cases.

(Bitbake rev: a981df3cc9bf410d24f39919959952bdc6c76d03)

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

bitbake/lib/bb/event.py

@@ -206,13 +206,17 @@ def getName(e):
 class ConfigParsed(Event):
     """Configuration Parsing Complete"""
 
-class RecipeParsed(Event):
-    """ Recipe Parsing Complete """
-
+class RecipeEvent(Event):
     def __init__(self, fn):
         self.fn = fn
         Event.__init__(self)
 
+class RecipePreFinalise(RecipeEvent):
+    """ Recipe Parsing Complete but not yet finialised"""
+
+class RecipeParsed(RecipeEvent):
+    """ Recipe Parsing Complete """
+
 class StampUpdate(Event):
     """Trigger for any adjustment of the stamp files to happen"""