toolchain: Bump ARC tools to arc-2016.09-eng013

toolchain: Bump ARC tools to arc-2016.09-eng013

As described at:
4520524ba055706236db9f00dd79f1b2e2e87fde
this commit continues a series of updates of ARC tools.
This time we're updating tools to arc-2016.09-eng013.

This engenering build contains some important GCC updatesthat fixes
some failures for ARC, such as:
http://autobuild.buildroot.net/results/f80/f80ad8a07d9d58b46592c2c99b227197b0f808d3//
http://autobuild.buildroot.net/results/e59/e59e6592fc697cceda359e421387dd905ff04701//
http://autobuild.buildroot.net/results/521/52157aa2b5d75b5338f3bde7ae5beb3d300283d3//

We still keep GDB as it is of arc-2016.03 release because there're some
issues we'd like to resolve before releasing it to wider audience.

So again note this is next engineering builds of arc-2016.09 series
and it might have all kinds of breakages, please don't use it for
production builds.

Signed-off-by: Vlad Zakharov <vzakhar@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>