Cross Reference: /external/clang/test/Modules/Inputs/PR21687

`Name`	`Date`	`Size`
Up to higher level directory
`a.h`	06-Dec-2017	`33`
`b.h`	06-Dec-2017	`29`
`c.h`	06-Dec-2017	`72`
`module.modulemap`	06-Dec-2017	`105`