Disable fixedfeaturecpu test on Valgrind bots
Disable fixedfeaturecpu test on Valgrind bots

Valgrind misdetects CPU capabilities thus on Opteron bots
(trybots) test fails and on Intel bots (buildbots) it passes.

BUG=http://code.google.com/p/nativeclient/issues/detail?id=3380
TEST=trybots
Review URL: https://codereview.chromium.org/14070007

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11166 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client