bitbake: toaster: add package manifest path to Target objects

Store the path to the *.rootfs.manifest file for targets which
generate images.

A link to the package manifest is displayed in the build dashboard
for targets which produce image files.

Like the license manifest path, if a target would have produced
the package manifest (but didn't, because it already existed), that
path is copied from the target which did produce the package
manifest.

(Bitbake rev: 79b8e349a0da2ea6b97ad82daa5837e6dfffe0af)

Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: bavery <brian.avery@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/orm/migrations/0009_target_package_manifest_path.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('orm', '0008_refactor_artifact_models'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='target',
+            name='package_manifest_path',
+            field=models.CharField(null=True, max_length=500),
+        ),
+    ]