It is very hard to investigate travis fails, when something is segfaulted.

Let's add our own core file handler which will provide all required
information for us. Now test/abrt.sh shows a process tree,
process mappings, registers and backtraces.

v2: change a variable name
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Thanked-by: Dmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>