(Temporarily) disable -Wl,-z,defs when using sanitizers

(Temporarily) disable -Wl,-z,defs when using sanitizers

Compiling with -Wl,-z,defs and asan requires declaring a dependency on
//build/config/sanitizers:deps in every shared_library and executable,
however piles and piles of targets do not do this yet so this flag busts
the asan/etc builds in GN.  Disable for now so we can add the
dependencies bit by bit.

R=thakis@chromium.org
BUG=371125
Committed: https://crrev.com/2eff74b542c9dceb330967c7fa06274a4addf443
Cr-Commit-Position: refs/heads/master@{#312543}

[jamesr, 2015-01-22 01:57:22]

This is unfortunate but I think the best option here

(this showed up on the mojo bots, which do compile with asan)

[Nico, 2015-01-22 02:03:15]

On 2015/01/22 01:57:22, jamesr wrote:
> This is unfortunate but I think the best option here
> 
> (this showed up on the mojo bots, which do compile with asan)

Lgtm. In the gyp build, I ended up disabling this for all sanitizers too (in 3
separate CLS, as not all sanitizer bots broke at the same time for some reason).

[jamesr, 2015-01-22 02:04:04]

The CQ bit was checked by jamesr@chromium.org

[commit-bot: I haz the power, 2015-01-22 02:05:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/810563008/1

[commit-bot: I haz the power, 2015-01-22 02:49:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-22 02:50:42]

Patchset 1 (id:??) landed as
https://crrev.com/2eff74b542c9dceb330967c7fa06274a4addf443
Cr-Commit-Position: refs/heads/master@{#312543}