travis: catch core dump files in error cases

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>

test/abrt.sh

@@ -0,0 +1,30 @@
+#!/bin/bash -x
+
+pid=$1
+vpid=$2
+sig=$3
+comm=$4
+
+exec &>> /tmp/zdtm-core.log
+
+expr match "$comm" zombie00 && {
+	cat > /dev/null
+	exit 0
+}
+
+report="/tmp/zdtm-core-$pid-$comm"
+exec &> ${report}.txt
+
+ps axf
+ps -p $pid
+
+cat /proc/$pid/status
+ls -l /proc/$pid/fd
+cat /proc/$pid/maps
+exec 33< /proc/$pid/exe
+cat > $report.core
+
+echo 'bt
+i r
+disassemble $rip-0x10,$rip + 0x10
+' | gdb -c $report.core /proc/self/fd/33