Roll toolchain deps to rev 8524.
Roll toolchain deps to rev 8524.

Motivated by pulling in an udpated newlib on the pnacl side.

BUG= none 
TEST= trybots
Review URL: https://chromiumcodereview.appspot.com/10382070

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@8533 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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