benchmark: convert bm_vm2_*.rb to vm2_*.yml

This YAML transformation is needed to support whileloop2 time substituion
by benchmark_driver.gem later.

This commmit changes no benchmark behavior.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63892 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

benchmark/vm2_zsuper.yml

@@ -0,0 +1,23 @@
+benchmark:
+  vm2_zsuper: |
+    i = 0
+
+    class C
+      def m a
+        1
+      end
+    end
+
+    class CC < C
+      def m a
+        super
+      end
+    end
+
+    obj = CC.new
+
+    while i<6_000_000 # benchmark loop 2
+      obj.m 10
+      i += 1
+    end
+loop_count: 1