rename compare-baselines.py and download-baselines.py using underscores instead of...

git-svn-id: http://skia.googlecode.com/svn/trunk@3663 2bbb7eff-a529-9590-31e7-b0007b416f81

diff --git a/tools/compare-baselines.py b/tools/compare_baselines.py
similarity index 100%
rename from tools/compare-baselines.py
rename to tools/compare_baselines.py

diff --git a/tools/download-baselines.py b/tools/download_baselines.py
similarity index 100%
rename from tools/download-baselines.py
rename to tools/download_baselines.py