Fix bench logging for --repeat 1

Addressing https://code.google.com/p/skia/issues/detail?id=1607

R=scroggo@google.com

Review URL: https://codereview.chromium.org/23923011

git-svn-id: http://skia.googlecode.com/svn/trunk@11181 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed