Don't build testing related plugins on x64 (complicated story with fPIC).
Don't build testing related plugins on x64 (complicated story with fPIC).

BUG=18337

Review URL: http://codereview.chromium.org/159655


git-svn-id: http://src.chromium.org/svn/trunk/src@22283 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: cc69e83a8ce712425672e83df2576c77b970f80c
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser