Cross Reference: /external/libcxx/test/std/algorithms/alg.sorting/alg.set.operations

`Name`	`Date`	`Size`
Up to higher level directory
`includes/`	06-Dec-2017
`nothing_to_do.pass.cpp`	06-Dec-2017	`372`
`set.difference/`	06-Dec-2017
`set.intersection/`	06-Dec-2017
`set.symmetric.difference/`	06-Dec-2017
`set.union/`	06-Dec-2017