Add argument to specify output directory for `swift` or `xcodebuild` logs

[art-divin]

Context

The default method of calculating build result output directory in Module.swift's init?(spmArguments:spmName:inPath) cannot be set from the outside:

let file = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("swift-build-\(UUID().uuidString).log")

When using CI like CircleCI, /tmp/ may not be available and due to nature of artefacts spec in config.yaml,
it would be great to be able to control output directory for Module command's processes 'swift' and 'xcodebuild' as an argument.