bitbake: bitbake: hob: check if parser has attribute 'shutdown'

It must be checked first if parser has the attribute 'shutdown' when
user hits Stop button and the forceshutdown state is given.

[HOB #5579]

(Bitbake rev: 46943b442ea4fa778f70590b6dcce483595efaf8)

Signed-off-by: Irina Patru <irina.patru@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/cooker.py

@@ -1245,7 +1245,8 @@ class BBCooker:
             return
 
         if self.state in (state.shutdown, state.forceshutdown):
-            self.parser.shutdown(clean=False, force = True)
+            if hasattr(self.parser, 'shutdown'):
+                self.parser.shutdown(clean=False, force = True)
             raise bb.BBHandledException()
 
         if self.state != state.parsing: