Comment 7 for bug 2015857

If I kill gnome-shell the crash file is written correctly:

```
$ killall -11 gnome-shell
$ apport-retrace -g /var/crash/_usr_bin_gnome-shell.1000.crash
[...]
[New LWP 7620]
Warnung: Section `.reg-xstate/7229' in core file too small.
Downloading separate debug info for /usr/lib/x86_64-linux-gnu/mutter-12/libmutter-clutter-12.so.0
[...]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/bin/gnome-shell'.
Program terminated with signal SIGSEGV, Segmentation fault.
Warnung: Section `.reg-xstate/7229' in core file too small.
#0 __pthread_kill_implementation (no_tid=0, signo=11, threadid=<optimized out>) at ./nptl/pthread_kill.c:44
Download failed: Das Argument ist ungültig. Continuing without source file ./nptl/./nptl/pthread_kill.c.
44 ./nptl/pthread_kill.c: Datei oder Verzeichnis nicht gefunden.
[Current thread is 1 (Thread 0x7f250baaf600 (LWP 7229))]
(gdb) bt
#0 __pthread_kill_implementation (no_tid=0, signo=11, threadid=<optimized out>) at ./nptl/pthread_kill.c:44
#1 __pthread_kill_internal (signo=11, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
[...]
```