minor fixes to start_pipeline_lowp

   - in _lowp.cpp, JUMPER is always defined, so no need to check.
   - the return type of this function has been void for a while.

Change-Id: I5271e8dab784f46c7ffa9cfba6eb55b5e399b537
Reviewed-on: https://skia-review.googlesource.com/24326
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
3 files changed