Fix bad Java8 test.

Change-Id: I82856369c8c0276448eee4abb3246cc0d6945577

user/test-super/com/google/gwt/dev/jjs/super/com/google/gwt/dev/jjs/test/Java8Test.java

diff --git a/user/test-super/com/google/gwt/dev/jjs/super/com/google/gwt/dev/jjs/test/Java8Test.java b/user/test-super/com/google/gwt/dev/jjs/super/com/google/gwt/dev/jjs/test/Java8Test.java
index 6a4ee29..7962573 100644
--- a/user/test-super/com/google/gwt/dev/jjs/super/com/google/gwt/dev/jjs/test/Java8Test.java
+++ b/user/test-super/com/google/gwt/dev/jjs/super/com/google/gwt/dev/jjs/test/Java8Test.java
@@ -1753,7 +1753,7 @@
 
   // Regresion test for https://github.com/gwtproject/gwt/issues/9497
   public void testVarargsFunctionalConversion() {
-    Function<String[], String> function = CompilerMiscRegressionTest::first;
+    java.util.function.Function<String[], String> function = Java8Test::first;
     assertEquals("Hello", function.apply(new String[] {"Hello", "GoodBye"}));
   }
 }