Include floating-point registers in the backtrace

Closes rhbz#812204.

http://sourceware.org/gdb/current/onlinedocs/gdb/Registers.html#Registers

Signed-off-by: Martin Milata <mmilata@redhat.com>
Merge pull request #717 from abrt/rhbz812204

Include floating-point registers in the backtrace

Closes rhbz#812204.

http://sourceware.org/gdb/current/onlinedocs/gdb/Registers.html#Registers

Signed-off-by: Martin Milata <mmilata@redhat.com>