This commit bumps ARC toolchain to arc-2020.09-release.
ARC GNU tools of version arc-2020.09-release bring some quite significant
changes like:
* Binutils 2.34.50 with additional ARC patches
* GCC 10.0.2 with additional ARC patches
* GDB 10.0.50 with additional ARC patches
Signed-off-by: Evgeniy Didin <Evgeniy.Didin@synopsys.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: arc-buildroot@synopsys.com
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
