Use new, public try server for libyuv.

This change will make libyuv use the new public try server hosted in
Chrome infrastructure, available at 


TEST=submitted try job using command line overrides.
BUG=none
R=fbarchard@google.com

Review URL: https://webrtc-codereview.appspot.com/1419004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@688 16f28f9a-4ce2-e073-06de-1de4eb20be90

codereview.settings

@@ -5,9 +5,7 @@ CODE_REVIEW_SERVER: webrtc-codereview.appspot.com
 VIEW_VC: https://code.google.com/p/libyuv/source/detail?r=
 #STATUS:
 TRY_ON_UPLOAD: False
-TRYSERVER_HTTP_HOST: webrtc-cb-linux-master.cbf.corp.google.com
-TRYSERVER_HTTP_PORT: 9020
 TRYSERVER_ROOT: src
-#TRYSERVER_SVN_URL:
+TRYSERVER_SVN_URL: svn://svn.chromium.org/chrome-try/try-libyuv
 #GITCL_PREUPLOAD:
 #GITCL_PREDCOMMIT: