Revert fbf2424838:

postpone "transparent semantics for spread operator"
until Java-related design issues are resolved (java.utils.Arrays#asList).

compiler/tests/org/jetbrains/kotlin/codegen/VarArgTest.java

@@ -91,8 +91,7 @@ public class VarArgTest extends CodegenTestCase {
         Method main = generateFunction("test");
         String[] args = {"mama", "papa"};
         String[] result = (String []) main.invoke(null, new Object[] {args});
-        assertTrue(args != result);
-        assertTrue(Arrays.equals(args, result));
+        assertTrue(args == result);
     }
 
     public void testArrayAsVararg2() throws InvocationTargetException, IllegalAccessException {