Support additional_linker_inputs in swift_binary

[adincebic]

Addresses #1511

[adincebic]

@brentleyjones I updated the PR. I left swiftc_inputs in RunEnvironmentInfo since we probably want to be able to reference swiftc_inputs?

RunEnvironmentInfo(
            environment = expand_locations(
                ctx,
                ctx.attr.env,
                ctx.attr.swiftc_inputs + ctx.attr.additional_linker_inputs,
            ),

[brentleyjones]

While this is technically a breaking change, in a way that could be hard to fix in non-root modules, it doesn't look like any public modules was using swiftc_inputs for linker inputs. So I'm fine with this if @keith is.

[keith]

sure, i like naming matching other rules