[harmony] Move some regression tests to the right place

test/mjsunit/regress/regress-347906.js

Index: test/mjsunit/regress/regress-347906.js
diff --git a/test/mjsunit/regress/regress-347906.js b/test/mjsunit/regress/regress-347906.js
deleted file mode 100644
index c751618928c93015679087ee1b500637657aa341..0000000000000000000000000000000000000000
--- a/test/mjsunit/regress/regress-347906.js
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --allow-natives-syntax --harmony
-
-function foo() {
-  return Math.clz32(12.34);
-}
-
-foo();
-foo();
-%OptimizeFunctionOnNextCall(foo);
-foo();