Some tools, such as MSBuild, can't parse JSON easily. This change adds
a "list" option, which changes the output to list the deployed files, one
per line. The user can view the source, target, or relative target files
by passing -line <source|target|relative> to windeployqt.

Task-number: QTBUG-35328

Change-Id: I8181ea4f230e7e2b146a5019934ae5fbe768bcec
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>