Fix return code of restricted trace tests. The prior script was incorrectly comparing a boolean result with a number and producing the opposite result: True would be reported as a failure, and False would be reported as success. Bug: angleproject:4090 Bug: b/168049670 Change-Id: I47ec684a57c455c6a833232d0a49774b265f7b39 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2430667 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>