Increase hello_world_size test limit just a bit.
Increase hello_world_size test limit just a bit.

When built with --running_on_valgrind some optimizations are turned off, and we
get a slightly larger binary.
Review URL: http://codereview.chromium.org/7046006

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@5362 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client