various bug fixes.

1. update mac support for md5
2. update default build to be thumb

(SkipBuildbotRuns)

R=mtklein@google.com

Review URL: https://codereview.chromium.org/23514051

git-svn-id: http://skia.googlecode.com/svn/trunk@11201 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed