Fix a bug in the (ice-9 match) test

* testsuite/t-match.scm (matches?): Fix match invocation. As far as I can
  tell, although (ice-9 match) does advertise a => form of clauses, it
  requires that the end of the => be a symbol. For some reason this
  works in the interpreter:

    ((lambda () (begin => #t)))

  It's part of the expansion of matches?. It also worked in the old
  compiler. Thinking that maybe toplevel references could cause side
  effects, I made the new compiler actually ref =>, which brought this to
  light.

testsuite/t-match.scm

@@ -12,7 +12,7 @@
 (define (matches? obj)
 ;  (format #t "matches? ~a~%" obj)
   (match obj
-	 (($ stuff) => #t)
+	 (($ stuff) #t)
 ;	 (blurps    #t)
 	 ("hello"   #t)
 	 (else #f)))