toolchain: Bump ARC tools to arc-2016.09-eng013

As described at:
4520524ba0
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>

package/gcc/Config.in.host

@@ -121,7 +121,7 @@ config BR2_GCC_VERSION
 	default "4.9.4"     if BR2_GCC_VERSION_4_9_X
 	default "5.4.0"     if BR2_GCC_VERSION_5_X
 	default "6.2.0"     if BR2_GCC_VERSION_6_X
-	default "arc-2016.09-eng011" if BR2_GCC_VERSION_4_8_ARC
+	default "arc-2016.09-eng013" if BR2_GCC_VERSION_4_8_ARC
 
 config BR2_EXTRA_GCC_CONFIG_OPTIONS
 	string "Additional gcc options"

package/gcc/gcc.hash

@@ -12,4 +12,4 @@ sha512  2941cc950c8f2409a314df497631f9b0266211aa74746c1839c46e04f1c7c299afe2528d
 sha512  1e8b826a3d44b9d5899309894e20c03abeb352bf3d273b8ad63af814c0ee2911f1a83ce1cd4cdd2d1cb0b3e3c34e9b7ae1b2ab83dfc649ee817ab05247c76198  gcc-6.2.0.tar.bz2
 
 # Locally calculated (fetched from Github)
-sha512  5fa11058adc0fc3d33bb860151660101bc20c7147cd92bc235057cd722e7fdb923ac0bdf27b09499b8587abb0c420867229bd782bc10bee0c76116c099b5a76c  gcc-arc-2016.09-eng011.tar.gz
+sha512  9b916c2e3c595c0f085d45c09fdf1612c9dfc2a42006699c9af1c73b542ab73bfeb15ff0fbe0a87214156b3f6a146883f1e02e387b2c31701c34de221aa97327  gcc-arc-2016.09-eng013.tar.gz