ARC stable backport request

From: Vineet Gupta
Date: Mon Aug 22 2016 - 13:36:31 EST


Hi Stable Team,

Could you please backport upstream 20d780374c81c ("ARC: build: Better way to
detect ISA compatible toolchain")

This is needed to let kernel building with newer gcc 6.x based tools.

Thx,
-Vineet