Cross Reference: /frameworks/compile/slang/tests/P_extern_const

`Name`	`Date`	`Size`
Up to higher level directory
`extern_const.rs`	22-Oct-2020	`138`
`rs_core.rsh`	22-Oct-2020	`285`
`stderr.txt.expect`	22-Oct-2020	`0`
`stdout.txt.expect`	22-Oct-2020	`0`