Roll both toolchains to rev 7487
Roll both toolchains to rev 7487

Among other things this pulls in a pnacl TC which does not
use gnu-as anymore.
Review URL: http://codereview.chromium.org/9016014

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@7490 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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