Revert of Roll asan_symbolize.py to llvm r218071.

Revert of Roll asan_symbolize.py to llvm r218071. (patchset #2 id:20001 of https://codereview.chromium.org/584673002/)

Reason for revert:
This requires an accompanying change to the Chromium-specific wrapper.

NOTRY=true

Original issue's description:
> Roll asan_symbolize.py to llvm r218071.
>
> This fixes an issue with missing newlines in stacktraces.
>
> BUG=https://code.google.com/p/address-sanitizer/issues/detail?id=343
> TBR=glider@chromium.org
> NOTRY=true
>
> Committed: https://crrev.com/f7aef702936dcd93ab4928ead74e3db437c1f862
> Cr-Commit-Position: refs/heads/master@{#295531}

TBR=glider@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=https://code.google.com/p/address-sanitizer/issues/detail?id=343

Committed: https://crrev.com/c11fe9bc0a9cc225f4d734a3df1c315fc7c1ba42
Cr-Commit-Position: refs/heads/master@{#295535}

[earthdok, 2014-09-18 19:53:11]

Created Revert of Roll asan_symbolize.py to llvm r218071.

[commit-bot: I haz the power, 2014-09-18 19:53:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/580233003/1

[commit-bot: I haz the power, 2014-09-18 19:54:37]

Committed patchset #1 (id:1) as 6f623179a83cddea3f603838d83f811eb00946ff

[commit-bot: I haz the power, 2014-09-18 19:55:09]

Patchset 1 (id:??) landed as
https://crrev.com/c11fe9bc0a9cc225f4d734a3df1c315fc7c1ba42
Cr-Commit-Position: refs/heads/master@{#295535}