Fixed repo_tools invalid reference to pynacl.
Fixed repo_tools invalid reference to pynacl.

repo_tools is already inside of pynacl so references to
log_tools should not have the pynacl prefix.

R=dschuff@chromium.org, bradnelson@google.com
BUG= https://code.google.com/p/nativeclient/issues/detail?id=3872
TEST= trybots

Review URL: https://codereview.chromium.org/377653002

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@13448 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client