swift234

Modified the playground transform to fix two
problems related to scopes:

  - First, the return value was being printed
    after the relevant scope exits.  I switched
    the order.

  - Second, two "global" scopes were being
    emitted -- one for the wrapper function,
    and one for the wrapper "if" statement.  We
    only need one, so I added necessary gating.

<rdar://problem/16765632>


Swift SVN r17122