Changed to new value we support for kernel/panic.

Review URL: http://codereview.chromium.org/3136024
diff --git a/client/site_tests/platform_OSLimits/platform_OSLimits.py b/client/site_tests/platform_OSLimits/platform_OSLimits.py
index 4794f03..3f17762 100644
--- a/client/site_tests/platform_OSLimits/platform_OSLimits.py
+++ b/client/site_tests/platform_OSLimits/platform_OSLimits.py
@@ -80,7 +80,7 @@
                   }
 
         ref_equal = {'leases': 1,
-                     'panic': 0,
+                     'panic': -1,
                      'sysrq': 1,
                      'suid-dump': 0,
                     }