cli: add option remove crash dirs after reporting

Add option -d to abrt-cli report which allows delete dump dir after the problem
was successfully reported.

Related to rhbz#1067545

Signed-off-by: Matej Habrnal <mhabrnal@redhat.com>
Merge pull request #854 from abrt/rhbz1067545_remove_crash_dir_after_reporting

cli: add option remove crash dirs after reporting