Bug#833580: pcscada fails to build with ld --as-needed as the default

[Nicolas Boulenguez]

Package: src:pcscada
Followup-For: Bug #833580

Hello.

The attached patches fix this issue, and build with gcc-7.

Last one mostly patches the upstream files. You may want to release it
as upstream before updating the Debian package.

Thanks.

pcscada-patches.tar.gz
Description: application/gzip