ci/debian: don't install libc6-dev-ARCH-cross packages

There is no need to manually install libc6-dev-ARCH-cross packages.
Corresponding target arch packages will be pulled out via the dependency
of library dev packages.

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