tools/compiletest: fix argument ordering for allowing unused in ui & compile-fail tests
tools/compiletest: fix argument ordering for allowing unused in ui & compile-fail tests

aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust