gcc-6 (6.4.0-6) unstable; urgency=medium
* Update to SVN
20170915 (r252799) from the gcc-6-branch.
- Fix PR target/81833 (PPC), PR target/82181 (xtensa),
PR tree-optimization/81987, PR other/39851, PR ipa/81128,
PR inline-asm/82001, PR c++/81355, PR tree-opt/81696, PR ipa/81128.
* Fix PR sanitizer/81066, taken from the gcc-7-branch.
* Fix libjava build failure with glibc-2.26.
* Update the Linaro support to the 6.4-2017.09 snapshot.
[dgit import package gcc-6 6.4.0-6]