Implemented loop iterators

tests/programs_test.go

@@ -57,12 +57,13 @@ var programs = []struct {
 	{"branch-save", "", "", 0},
 	{"jump-near", "", "", 0},
 	{"switch", "", "", 0},
-	{"loop", "", "", 0},
+	{"loop-infinite", "", "", 0},
 	{"loop-lifetime", "", "", 0},
+	{"loop-limited", "", "", 0},
 	{"memory-free", "", "", 0},
 	{"out-of-memory", "", "", 0},
-	{"array-index-static", "", "", 0},
-	{"array-index-dynamic", "", "", 0},
+	{"index-static", "", "", 0},
+	{"index-dynamic", "", "", 0},
 	{"struct", "", "", 0},
 	{"len", "", "", 0},
 }