swift234

Made the PlaygroundTransform instrument the print()/
debugPrint() APIs correctly.  PlaygroundLogger implements
APIs that always take a boolean as their second argument.
If print()/debugPrint() are called with just one argument,
we add "true" as the second argument and replace the call
with a call to the appropriate PlaygroundLogger API.

Also modified the testcase to verify that this is happening
correctly, including when the boolean argument comes from a
more complicated expression.

<rdar://problem/21084145> [Swift integration] Playground AST rewrites not updated for latest Swift standard library changes


Swift SVN r28946