job: Move cancelled to Job

We cannot yet move the whole logic around job cancelling to Job because
it depends on quite a few other things that are still only in BlockJob,
but we can move the cancelled field at least.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>

job.c

@@ -95,6 +95,11 @@ const char *job_type_str(const Job *job)
     return JobType_str(job_type(job));
 }
 
+bool job_is_cancelled(Job *job)
+{
+    return job->cancelled;
+}
+
 Job *job_next(Job *job)
 {
     if (!job) {