Sort file refs and build refs by UUID so Xcode doesn't resort them on the next modification.
Sort file refs and build refs by UUID so Xcode doesn't resort them on
the next modification.

Review URL: http://codereview.chromium.org/18719

git-svn-id: http://src.chromium.org/svn/trunk/src@8645 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 196921ca8ceb162d69ce8ef683585dc69bf53607
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