Cross Reference: /external/clang/test/Modules/Inputs/libstdcxx-ambiguous-internal

`Name`	`Date`	`Size`
Up to higher level directory
`a.h`	06-Dec-2017	`78`
`b.h`	06-Dec-2017	`46`
`c.h`	06-Dec-2017	`46`
`d.h`	06-Dec-2017	`84`
`module.modulemap`	06-Dec-2017	`144`