Solve space construction "lockups" with simultaneous construction/deconstruction

[grays42]

Inspired by this reddit post showing a locked up, but solvable space construction problem:
www.reddit.com/r/factorio/comments/1lscrw4/sigh/

If the platform is in a state where it is "locked up", there are no further construction steps that can be taken, it should look to see whether it can resolve some of its unresolvable issues by simultaneously building a tile while deconstructing a tile. The image linked is completely solvable if it were able to initiate a construction and a deconstruction at the same time.