Cross Reference: /external/clang/test/Modules/Inputs/macro-ambiguity

`Name`	`Date`	`Size`
Up to higher level directory
`a/`	06-Dec-2017
`b/`	06-Dec-2017
`c/`	06-Dec-2017
`d/`	06-Dec-2017
`e/`	06-Dec-2017
`module.modulemap`	06-Dec-2017	`684`