proxy_settings.sh: explicitly add host address to no_proxy

proxy_settings.sh: explicitly add host address to no_proxy

Current no_proxy setting works fine for default qemu network settings.
It contains network 10.0.0.0/16, which should include host address and
enable communication with host.
But it doesn't work for zypper. Zypper respects no_proxy variable, but
accepts only host addresses, not network addresses. To enable local zypper
repo from host, it is required to add host address to no_proxy explicitly.

Change-Id: I0ee189ea952d9c7b12f169abd7bd0364d5a30aee
Signed-off-by: Rafal Krypa <r.krypa@samsung.com>