rename reftest files to correct names

--HG--
rename : layout/reftests/bugs/bug488685-ref.html => layout/reftests/bugs/488685-1-ref.html
rename : layout/reftests/bugs/bug488685.html => layout/reftests/bugs/488685-1.html

layout/reftests/bugs/reftest.list

@@ -1209,6 +1209,6 @@ fails == 472020-2.xul 472020-2-ref.xul
 == 486052-2g.html 486052-2-ref.html
 == 486848-1.xul 486848-1-ref.xul
 == 487539-1.html about:blank
-== 488685.html 488685-ref.html
 
 == 488390-1.html 488390-1-ref.html
+== 488685-1.html 488685-1-ref.html