ci/debian: use dpkg-architecture to detect gcc-cross package name

Rather than specifying GCC packages manually, generate package name
using dpkg-architecture.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
1 file changed