The following command also seems to temporarily resolve it.
sudo dpkg --force-all -i /var/cache/apt/archives/libstdc++6-armhf-cross_4.8.4-2ubuntu1~14.04.1cross0.11.1_all.deb
The following command also seems to temporarily resolve it.
sudo dpkg --force-all -i /var/cache/ apt/archives/ libstdc+ +6-armhf- cross_4. 8.4-2ubuntu1~ 14.04.1cross0. 11.1_all. deb