bitbake: toaster: cached outcome download button

When a task is executed successfully without using saved-state cache,
then a button appears allowing the user to download the log file for
that task.  This commit allows the user to download the log file for a
task that is completed by unpacking data from the saved-state cache, a
task with outcome 'Cached'.  The same button 'Download task log' is
shown, which when pressed downloads the '_setscene' log file for that
task.

[YOCTO #7379]

(Bitbake rev: d4ac60c41f1ee9a8c59f9ede5b0948303f793afa)

Signed-off-by: Dave Lerner <dave.lerner@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/templates/task.html

@@ -130,6 +130,13 @@
             </dd>
         </dl>
     {%elif task.outcome == task.OUTCOME_CACHED%}
+        {% if MANAGED and build.project %}
+            {% for t in task.get_related_setscene %}
+                {% if forloop.last %}
+                    <a class="btn btn-large" href="{% url 'build_artifact' build.id "tasklogfile" t.pk %}" style="margin:15px;">Download task log</a>
+                {% endif %}
+            {% endfor %}
+        {% else %}
         <dl class="dl-horizontal">
             <dt>
                 <i class="icon-question-sign get-help" title="Path the task log file"></i> Log file
@@ -138,6 +145,7 @@
                 <code>{% for t in task.get_related_setscene %} {{t.logfile}} {% endfor %}</code>
             </dd>
         </dl>
+        {% endif %}
     {%elif task.outcome == task.OUTCOME_EMPTY%}
         <div class="alert alert-info details">
             This task is empty because it has the <code>noexec</code> flag set to <code>1</code>, or the task function is empty