gcc-6 (6.4.0-8) unstable; urgency=medium
* Update to SVN
20171010 (r253582) from the gcc-6-branch.
- Fix PR libstdc++/60936, PR tree-optimization/82337,
PR target/81996 (PPC), PR target/71951 (AArch64).
* Fix builds without hppa64 cross compiler and new debhelper. See: #877589.
* Fix build dependency on realpath. Closes: #877818.
[dgit import package gcc-6 6.4.0-8]