examples.html: add a separate column for ppapi/examples from chrome
examples.html: add a separate column for ppapi/examples from chrome

BUG=none
TESTED=manually+bots
Review URL: http://codereview.chromium.org/6928008

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@5193 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,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client