build profiling mode into all clang debug builds

It's kind of annoying to have to remember to use these other build
files, and this way it's only turned on when you explicitly ask at
runtime in bench.

Change-Id: I0e92b9ea515c01088267a236f2a7c8c66326c530
Reviewed-on: https://skia-review.googlesource.com/123249
Auto-Submit: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
5 files changed