script to list the topsorted dependencies (#562)
script to list the topsorted dependencies (#562)

Motivation:

Sometimes it's useful to know the top-sorted dependency order. For
example if you need to do something in an order where all dependencies
of a target have already previously processed.

Modifications:

added scripts/list_topsorted_dependencies.sh

Result:

can write other scripts that need top-sorted dependencies
apple/swift-nio,apple/swift-nio,apple/swift-nio,apple/swift-nio,apple/swift-nio