gcc-6 (6.4.0-4) unstable; urgency=medium
* Update to SVN
20170820 (r251205) from the gcc-6-branch.
- Fix PR target/81894 (x86), PR target/81861 (x86),
PR tree-optimization/81354, PR c++/71570.
* Don't build the gc enabled libobjc for cross compilers. Closes: #872301.
* Fix hangs w/ asan binaries on arm64 (Dann Frazier). LP: #
1709727.
[dgit import package gcc-6 6.4.0-4]