Add generic_trace_ct benchmark
Add generic_trace_ct benchmark

Change-Id: I93efeadc47574594644502a7ec32cc3222115b2d
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/219780
Auto-Submit: Xianzhu Wang <56bf68553a6eeecbbaf7c80da87195a59c9681bb@chromium.org>
Commit-Queue: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot