test: match gccgo error messages for bug388.go

As runtime.UintType is no longer defined, the gccgo error
messages have changed.

bug388.go:12:10: error: reference to undefined identifier ‘runtime.UintType’
bug388.go:12:10: error: invalid named/anonymous mix
bug388.go:13:21: error: reference to undefined identifier ‘runtime.UintType’
bug388.go:17:10: error: reference to undefined identifier ‘runtime.UintType’
bug388.go:18:18: error: reference to undefined identifier ‘runtime.UintType’
bug388.go:22:9: error: non-name on left side of ‘:=’
bug388.go:27:10: error: expected type
bug388.go:32:9: error: expected type
bug388.go:23:14: error: reference to field ‘i’ in object which has no fields or methods

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5755044

test/fixedbugs/bug388.go

@@ -9,13 +9,13 @@
 package main
 import "runtime"
 
-func foo(runtime.UintType, i int) {  // ERROR "cannot declare name runtime.UintType|named/anonymous mix"
-	println(i, runtime.UintType) 
+func foo(runtime.UintType, i int) {  // ERROR "cannot declare name runtime.UintType|named/anonymous mix|undefined identifier"
+	println(i, runtime.UintType) // GCCGO_ERROR "undefined identifier"
 }
 
 func bar(i int) {
-	runtime.UintType := i       // ERROR "cannot declare name runtime.UintType|non-name on left side"
-	println(runtime.UintType)	// GCCGO_ERROR "invalid use of type"
+	runtime.UintType := i       // ERROR "cannot declare name runtime.UintType|non-name on left side|undefined identifier"
+	println(runtime.UintType)	// GCCGO_ERROR "invalid use of type|undefined identifier"
 }
 
 func baz() {