bitbake: toastergui: Add missing task descriptions

The "Prebuilt task could be based on" table we provide in the task
details page for prebuilt tasks is missing the task descriptions.
This patch adds them.

[YOCTO #6328]

(Bitbake rev: 64894d640ee70a301f6f399db118ed17c0ccde08)

Signed-off-by: Belen Barros Pena <belen.barros.pena@linux.intel.com>
Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

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

@@ -82,6 +82,9 @@
                             </td>
                             <td>
                                 <a href="{%url "task" match.build.pk match.pk%}">{{match.task_name}}</a>
+                                {% if task.get_description %}
+                                    <i class="icon-question-sign get-help hover-help" title="{{task.get_description}}"></i>
+                                {% endif %}
                             </td>
                             <td>
                                 <a href="{%url "task" match.build.pk match.pk%}">{{match.get_executed_display}}</a>