Comment 4 for bug 1557205

Same for me:
Ubuntu 14.04.4 LTS

Trying to install this package (as part of NVidia JetPack installer) yield the same error:

chen@maint-Latitude-E6330 nvidia$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
  libstdc++6-armhf-cross
The following packages will be upgraded:
  libstdc++6-armhf-cross
1 upgraded, 0 newly installed, 0 to remove and 52 not upgraded.
53 not fully installed or removed.
Need to get 0 B/210 kB of archives.
After this operation, 77.8 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 310567 files and directories currently installed.)
Preparing to unpack .../libstdc++6-armhf-cross_4.8.4-2ubuntu1~14.04.1cross0.11.1_all.deb ...
Unpacking libstdc++6-armhf-cross (4.8.4-2ubuntu1~14.04.1cross0.11.1) over (4.8.2-16ubuntu4cross0.11) ...
dpkg: error processing archive /var/cache/apt/archives/libstdc++6-armhf-cross_4.8.4-2ubuntu1~14.04.1cross0.11.1_all.deb (--unpack):
 trying to overwrite '/usr/share/gcc-4.8/python/libstdcxx/__init__.py', which is also in package libstdc++6:i386 4.8.4-2ubuntu1~14.04.1
Errors were encountered while processing:
 /var/cache/apt/archives/libstdc++6-armhf-cross_4.8.4-2ubuntu1~14.04.1cross0.11.1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)