Cross Reference: /external/r8/src/test/examples/shaking9

`Name`	`Date`	`Size`
Up to higher level directory
`keep-rules.txt`	06-Dec-2017	`453`
`Shaking.java`	06-Dec-2017	`368`
`Subclass.java`	06-Dec-2017	`528`
`Superclass.java`	06-Dec-2017	`444`