Cross Reference: /external/clang/test/Modules/Inputs/multiple-include

`Name`	`Date`	`Size`
Up to higher level directory
`a.h`	21-Aug-2018	`15`
`b.h`	21-Aug-2018	`78`
`c.h`	21-Aug-2018	`45`
`module.modulemap`	21-Aug-2018	`156`
`x.h`	21-Aug-2018	`0`