bitbake: event.py: fix regression about INVALIDCONF

A previous commit uses __BBHANDLERS_MC to record all handlers, but
it does not take into consideration of INVALIDCONF, thus causing regression.

We need to record the name before returned AlreadyRegistered, otherwise, when
reparsing due to INVALIDCONF, bascially all handlers are not called.

(Bitbake rev: f6fb6f22fa6ba1ffe121948d7f53ac724358491e)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/event.py

@@ -238,6 +238,10 @@ def register(name, handler, mask=None, filename=None, lineno=None, data=None):
 
     # already registered
     if name in _handlers:
+        if data:
+            bbhands_mc = (data.getVar("__BBHANDLERS_MC") or [])
+            bbhands_mc.append(name)
+            data.setVar("__BBHANDLERS_MC", bbhands_mc)
         return AlreadyRegistered
 
     if handler is not None: