add some .gitignores related to gm and tools

NOTREECHECKS=True
NOTRY=True
R=scroggo@google.com
TBR=scroggo

Author: epoger@google.com

Review URL: https://codereview.chromium.org/234603004

git-svn-id: http://skia.googlecode.com/svn/trunk@14150 2bbb7eff-a529-9590-31e7-b0007b416f81
9 files changed