Make commandline flags nicer for fuzz executable

This cleans up the build so commandline flags defined in tools/*.cpp
don't get globbed into the fuzzer's.

Bug: skia:
Change-Id: I5994aa5bf75686641baf0cf97fd81141f0ac6f3a
Reviewed-on: https://skia-review.googlesource.com/92680
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
2 files changed