Cross Reference: /external/clang/test/Modules/Inputs/cxx-lookup

`Name`	`Date`	`Size`
Up to higher level directory
`a.h`	06-Dec-2017	`43`
`b.h`	06-Dec-2017	`58`
`c1.h`	06-Dec-2017	`36`
`c2.h`	06-Dec-2017	`44`
`module.modulemap`	06-Dec-2017	`305`
`na.h`	06-Dec-2017	`49`
`nb.h`	06-Dec-2017	`30`
`x.h`	06-Dec-2017	`79`
`y.h`	06-Dec-2017	`92`