bitbake: toaster: orm Add last_updated field to CustomImageRecipe

Field to keep track of when the package list for the CustomImageRecipe
was last updated from a build.

(Bitbake rev: 4bd4e49f13a7625997a43f3b2e67ed42c3c8e08b)

Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: brian avery <avery.brian@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/orm/models.py

@@ -1446,6 +1446,7 @@ class CustomImageRecipe(Recipe):
     search_allowed_fields = ['name']
     base_recipe = models.ForeignKey(Recipe, related_name='based_on_recipe')
     project = models.ForeignKey(Project)
+    last_updated = models.DateTimeField(null=True, default=None)
 
     def get_last_successful_built_target(self):
         """ Return the last successful built target object if one exists