Cross Reference: /external/libcxx/test/std/input.output/file.streams/fstreams/filebuf.assign

`Name`	`Date`	`Size`
Up to higher level directory
`member_swap.pass.cpp`	21-Aug-2018	`1.6K`
`move_assign.pass.cpp`	21-Aug-2018	`1.7K`
`nonmember_swap.pass.cpp`	21-Aug-2018	`1.7K`