swift234

Do not link (import from stdlib) the 'print' family of functions.

We don't need the "print to stdout" family of functions to be fast
and prefer to reduce the binary size by not linking the printing code
(and all of its dependencies).

This reduces the SIL of the code of a file that contains 'println()' from
~4000** lines of SIL down to ~200.

**(depending on the assert configuration)

Swift SVN r24404