HACKING: refine required packages

Debian since Jessie (8.0 from 2015) seems to have automake v1.14, so
mentioning some specific configuration for it is not needed.  In the
same time other required libraries and tools are not mentioned, so let's
refresh the requirements list.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
1 file changed