anaconda.core dumps have PID suffix, so correct for that

Summary:
Apparently it'll be something like anaconda.core.(PID). This
should result in that getting compressed and uploaded only if it
exists.

Test Plan:
Try and hit the Mystery Crasher and see if we get the
damn core file this time.

Reviewers: jskladan, garretraziel

Reviewed By: garretraziel

Subscribers: tflink

Differential Revision: https://phab.qadevel.cloud.fedoraproject.org/D688

lib/anacondatest.pm

@@ -44,7 +44,8 @@ sub post_fail_hook {
         upload_logs "/tmp/var_log.tar.gz";
 
         # Upload anaconda core dump, if there is one
-        upload_logs "/tmp/anaconda.core";
+        script_run "ls /tmp/anaconda.core.* && tar czf /tmp/anaconda.core.tar.gz /tmp/anaconda.core.*";
+        upload_logs "/tmp/anaconda.core.tar.gz";
     }
     else {
         save_screenshot;