Add a suppressions file for leak sanitizer.

Add a suppressions file for leak sanitizer.

LeakSanitizer is built into AddressSanitizer, and runs with no extra speed
penalty.  Most interestingly, it's got a lock-free allocator, so it doesn't
bottleneck threaded code.

This file is enough to supress all leak warnings except from the Nvidia driver
on my desktop for tests and dm.  Looks like lsan doesn't or can't pay attention
to leaked globals (-fno-common doesn't affect this).

BUG=skia:
R=robertphillips@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/145033010

git-svn-id: http://skia.googlecode.com/svn/trunk@13153 2bbb7eff-a529-9590-31e7-b0007b416f81