Add test cases based on the programs from the Embenchen benchmark suite.

TEST=mjsunit/asm/embenchen
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/704653004

Cr-Commit-Position: refs/heads/master@{#25135}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25135 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/mjsunit.status

@@ -30,6 +30,11 @@
   # All tests in the bug directory are expected to fail.
   'bugs/*': [FAIL],
 
+  ##############################################################################
+  # Slow tests.
+  'asm/embenchen/box2d': [PASS, SLOW],
+  'asm/embenchen/lua_binarytrees': [PASS, SLOW],
+
   ##############################################################################
   # Flaky tests.
   # BUG(v8:2921).