[a64]: Disable failing sparse-array-reverse on a64 debug builds.

BUG=v8:3158
LOG=N
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/160633002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19340 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/mjsunit.status

@@ -187,6 +187,9 @@
   'compiler/concurrent-invalidate-transition-map': [PASS, ['gc_stress == True', FAIL]],
   # BUG(v8:3157): Fails on gc stress bots.
   'sparse-array-reverse': [PASS, ['gc_stress == True', FAIL]],
+
+  # BUG(v8:3158): Fails on no_snap debug bots.
+  'sparse-array-reverse': [PASS, ['mode == debug', FAIL]],
 }],  # 'arch == a64'
 
 ['arch == a64 and mode == debug and simulator_run == True', {