Adding sha1 file for pnacl toolchains uploaded to GSD.
Adding sha1 file for pnacl toolchains uploaded to GSD.

Added comment to make clear that this affects the pnacl toolchain.

BUG= http://code.google.com/p/nativeclient/issues/detail?id=2831
TEST=manual
Review URL: https://chromiumcodereview.appspot.com/10511009

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@8795 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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