Add Perf-Win2k8-Clang bots.

Change-Id: I8108f48bb55cfb39532ef05e8e263769ff8fb10f
Reviewed-on: https://skia-review.googlesource.com/29420
Reviewed-by: Yuqian Li <liyuqian@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
2 files changed