Adjusts Ubuntu bench multi_4_threads values. Widens range to cope with the new average instead of 25th.

BUG=
R=robertphillips@google.com

Author: bensong@google.com

Review URL: https://codereview.chromium.org/108653014

git-svn-id: http://skia.googlecode.com/svn/trunk@12736 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed