Skip json2 on 64 bits debug.

BUG=3681
LOG=n
TBR=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/701353003

Cr-Commit-Position: refs/heads/master@{#25186}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25186 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/mjsunit.status

@@ -74,13 +74,16 @@
 
   # Some tests are just too slow to run for now.
   'bit-not': [PASS, NO_VARIANTS],
-  'json2': [PASS, NO_VARIANTS],
   'packed-elements': [PASS, NO_VARIANTS],
   'unbox-double-arrays': [PASS, NO_VARIANTS],
   'whitespaces': [PASS, NO_VARIANTS],
   'compiler/osr-assert': [PASS, NO_VARIANTS],
   'regress/regress-2185-2': [PASS, NO_VARIANTS],
 
+  # BUG(3681). Skipping in 64 bits debug is part of the bug report.
+  # Running no variants was the default.
+  'json2': [PASS, NO_VARIANTS, ['mode == debug and (arch == x64 or arch == arm64 or arch == android_arm64 or arch == mips64el)', SKIP]],
+
   # Issue 3660: Replacing activated TurboFan frames by unoptimized code does
   # not work, but we expect it to not crash.
   'debug-step-turbofan': [PASS, FAIL],