Revert of Disable yama on 3.2 kernels with 32bit userland and 64bit kernel.

Revert of Disable yama on 3.2 kernels with 32bit userland and 64bit kernel. (https://codereview.chromium.org/371113003/)

Reason for revert:
Broke clang builders:
https://build.chromium.org/p/chromium.linux/builders/Linux%20Clang%20(dbg)/builds/61819/steps/compile/logs/stdio

Original issue's description:
> Disable two yama tests on 3.2 kernels with 32bit userland and 64bit kernel.
> 
> Disabling yama restrictions is broken there.
> 
> BUG=391916
> R=jorgelo@chromium.org
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=281666
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=281757

TBR=jorgelo@chromium.org,keescook@chromium.org,thakis@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=391916
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=281763

[eseidel, 2014-07-08 16:09:36]

Created Revert of Disable yama on 3.2 kernels with 32bit userland and 64bit
kernel.

[commit-bot: I haz the power, 2014-07-08 16:10:48]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/eseidel@chromium.org/374933002/1

[commit-bot: I haz the power, 2014-07-08 16:12:13]

Change committed as 281763

[Nico, 2014-07-08 16:18:35]

On 2014/07/08 16:12:13, I haz the power (commit-bot) wrote:
> Change committed as 281763

This was fixed on trunk already. Please look at the tree before blindly
reverting.

Please reland this.

[Michael Achenbach, 2014-07-08 16:20:44]

A revert of this CL has been created in
https://codereview.chromium.org/374943002/ by machenbach@chromium.org.

The reason for reverting is: [Sheriff] This was fixed already in 281762..

[Nico, 2014-07-08 16:21:13]

On 2014/07/08 16:18:35, Nico (away) wrote:
> On 2014/07/08 16:12:13, I haz the power (commit-bot) wrote:
> > Change committed as 281763
> 
> This was fixed on trunk already. Please look at the tree before blindly
> reverting.
> 
> Please reland this.

Also your revert will likely break the tree since my follow up build fix depends
on this being in.

[eseidel, 2014-07-08 16:30:38]

I was certainly not trying to cause trouble.  I'm in #chromium and in contact
with the sheriffs.