Update gcc revision to c69a5b7
Update gcc revision to c69a5b7

This brings in:

c69a5b7 Predefine __LITTLE_ENDIAN__

BUG= none
TEST= toolchain trybots

R=pdox@google.com

Review URL: https://chromiumcodereview.appspot.com/9460017

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@7886 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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