Try to fix SHA1Test.RFC3174 -- I forgot space for the nul character.

BUG=none
TBR=falken@chromium.org

Review URL: https://codereview.chromium.org/48273008

git-svn-id: svn://svn.chromium.org/blink/trunk@160792 bbb929c8-8fbe-4397-9dbb-9b2b20218538