bug163: ideographs are not letters

also update golden.out from bug162

R=rsc
DELTA=16  (16 added, 0 deleted, 0 changed)
OCL=30298
CL=30324

test/bugs/bug163.go

+// errchk $G $D/$F.go
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import "fmt"
+
+func main() {
+	日本語 := 1;	// Japanese ideographs are not letters
+}

test/golden.out

@@ -101,6 +101,13 @@ xyz: expected 1 2 3 got 3 2 1
 abc: expected 4 5 6 got -4 4 4
 BUG: bug159
 
+=========== bugs/bug162.go
+123
+BUG: should fail
+
+=========== bugs/bug163.go
+BUG: should not compile
+
 =========== fixedbugs/bug016.go
 fixedbugs/bug016.go:7: constant -3 overflows uint