Add test for break in class body too

Author: msimacek

graalpython/com.oracle.graal.python.test/src/com/oracle/graal/python/test/parser/BasicTests.java

@@ -504,6 +504,14 @@ public void for16() throws Exception {
                                         "        continue\n");
     }
 
+    @Test
+    public void for17() throws Exception {
+        checkSyntaxError(
+                        "for i in range(10):\n" +
+                                        "    class foo:\n" +
+                                        "        break\n");
+    }
+
     @Test
     public void global01() throws Exception {
         checkScopeAndTree();