swift234

Remove @transparent from a few functions in the stdlib.

Marking these generic functions as transparent results in our not
emitting diagnostics for unreachable code if these functions are the
only code in a block and inlining generic code is enabled (due to
<rdar://problem/17687851>).

I don't believe other diagnostics benefit in any way from having these
marked as @transparent, and removing @transparent actually improved
Ackerman at -O3 by 15%.

Swift SVN r19996