Cleanup: Move mjsunit/regress-*.js into mjsunit/regress/.

test/mjsunit/regress-587004.js

Index: test/mjsunit/regress-587004.js
diff --git a/test/mjsunit/regress-587004.js b/test/mjsunit/regress-587004.js
deleted file mode 100644
index 9dc6052c43fc236804299f2401968bd5d992b925..0000000000000000000000000000000000000000
--- a/test/mjsunit/regress-587004.js
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright 2016 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: --expose-gc --min-semi-space-size=32
-
-// We need to set --min-semi-space-size to enable allocation site pretenuring.
-
-function foo(i) {
-  with({}) {};
-  x = {};
-  x.a = 0.23;
-  x.b = 0.3;
-  return x;
-}
-
-var all = [];
-function step() {
-  for (var i = 0; i < 100; i++) {
-    var z = foo(i);
-    // Write unboxed double in object slack.
-    z.c = 0.1 + z.b
-    all.push(z);
-  }
-  gc(1);
-  gc(1);
-}
-
-step();
-// Now foo will allocate objects in old space.
-step();