swift234

[test] Move stdlib/Algorithm test to validation-test suite.

It takes a long time to compile (at least partly due to rdar://problem/20875936)
and then takes a long time to run (because it's a very large collection of
test cases). Dmitri says he prefers not to split it up into multiple tests.

This cuts my debug compiler / debug stdlib local testing time by over 15%.

Swift SVN r28811