Disable disassembly output if backtrace is too big

Closes rhbz#995889.

Coredump from gnome-shell mentioned in bugzilla produces
32MB big disassembly output for each gdb run, making
the process extremely slow. This patch disables
disassembly output after the first failure.

Signed-off-by: Richard Marko <rmarko@redhat.com>
Merge pull request #716 from abrt/rhbz995889

Disable disassembly output if backtrace is too big

Closes rhbz#995889.

Coredump from gnome-shell mentioned in bugzilla produces
32MB big disassembly output for each gdb run, making
the process extremely slow. This patch disables
disassembly output after