Explicitly set SYMROOT= when running xcodebuild so tests can't fail based on user settings. Review URL: http://codereview.chromium.org/165179
Explicitly set SYMROOT= when running xcodebuild so tests can't
fail based on user settings.
Review URL: http://codereview.chromium.org/165179

git-svn-id: e7e1075985beda50ea81ac4472467b4f6e91fc78@586 78cadc50-ecff-11dd-a971-7dbc132099af

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