Allow nacl_cpuid (a test tool) to be built on x86-64 too
Allow nacl_cpuid (a test tool) to be built on x86-64 too

This tool is useful for debugging issue 1281, which applies to both
x86-32 and x86-64.

BUG=http://code.google.com/p/nativeclient/issues/detail?id=1281
TEST=run nacl_cpuid

Review URL: http://codereview.chromium.org/6048012

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@4053 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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