Update perf expectations for nacl_helper.
Update perf expectations for nacl_helper.

Revision 129061 causes nacl_helper to link in HMAC and SHA256 from crypto,
increasing its size.

BUG= http://code.google.com/p/nativeclient/issues/detail?id=2515
TEST= none

Review URL: https://chromiumcodereview.appspot.com/9866019

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@129084 0039d316-1c4b-4281-b951-d872f2087c98

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