Add more subtype checks, and repeat them so that any inlined checks can be tested as well (first te…

tests/language/src/GenericInstanceofTest.dart

Index: tests/language/src/GenericInstanceofTest.dart
===================================================================
--- tests/language/src/GenericInstanceofTest.dart	(revision 7030)
+++ tests/language/src/GenericInstanceofTest.dart	(working copy)
@@ -7,5 +7,8 @@
 #source("GenericInstanceof.dart");
 
 main() {
-  GenericInstanceof.testMain();
+  // Repeat type checks so that inlined tests can be tested as well.
+  for (int i = 0; i < 5; i++) {
+    GenericInstanceof.testMain();
+  }
 }