Revert of Remove LSan options/suppressions from test_env.py.

Revert of Remove LSan options/suppressions from test_env.py. (patchset #1 id:1 of https://codereview.chromium.org/940033002/)

Reason for revert:
Breaks Linux ASAN:

https://build.chromium.org/p/chromium.memory/builders/Linux%20ASan%20LSan%20Builder/builds/19163/steps/isolate%20tests/logs/stdio

The error is:

MappingError: Input file /mnt/data/b/build/slave/Linux_ASan_LSan_Builder/build/src/tools/lsan/suppressions.txt doesn't exist

Original issue's description:
> Remove LSan options/suppressions from test_env.py.
>
> Those are now compiled into the executable.
> Also remove tools/lsan/ which used to house the suppressions file.
>
> BUG=302040
> R=kjellander@chromium.org
>
> Committed: https://crrev.com/09fef383665c6d75776bb0b649b29685b38ce617
> Cr-Commit-Position: refs/heads/master@{#318035}

TBR=kjellander@chromium.org,earthdok@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=302040
Committed: https://crrev.com/207c1a328efe47f10bb0fb41411936051b2bf062
Cr-Commit-Position: refs/heads/master@{#318043}

[phoglund_chromium, 2015-02-25 14:29:06]

Created Revert of Remove LSan options/suppressions from test_env.py.

[commit-bot: I haz the power, 2015-02-25 14:29:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/956603004/1

[commit-bot: I haz the power, 2015-02-25 14:30:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-25 14:31:56]

Patchset 1 (id:??) landed as
https://crrev.com/207c1a328efe47f10bb0fb41411936051b2bf062
Cr-Commit-Position: refs/heads/master@{#318043}