Move kernel baseline tests to front_end.

pkg/kernel/testcases/input/call.dart

-class Callable {
-  call(x) {
-    return "string";
-  }
-}
-
-class CallableGetter {
-  get call => new Callable();
-}
-
-main() {
-  var closure = (x) => x;
-  var int1 = closure(1);
-  var int2 = closure.call(1);
-  var int3 = closure.call.call(1);
-  var int4 = closure.call.call.call(1);
-
-  var callable = new Callable();
-  var string1 = callable(1);
-  var string2 = callable.call(1);
-  var string3 = callable.call.call(1);
-  var string4 = callable.call.call.call(1);
-
-  var callableGetter = new CallableGetter();
-  var string5 = callableGetter(1);
-  var string6 = callableGetter.call(1);
-  var string7 = callableGetter.call.call(1);
-  var string8 = callableGetter.call.call.call(1);
-
-  var nothing1 = closure();
-  var nothing2 = closure.call();
-  var nothing3 = closure.call.call();
-  var nothing4 = closure.call.call.call();
-
-  var nothing5 = callable();
-  var nothing6 = callable.call();
-  var nothing7 = callable.call.call();
-  var nothing8 = callable.call.call.call();
-
-  var nothing9 = callableGetter();
-  var nothing10 = callableGetter.call();
-  var nothing11 = callableGetter.call.call();
-  var nothing12 = callableGetter.call.call.call();
-}