Add the condition for enabling c++11 test.

Add the condition for enabling c++11 test.

The range-based for loops is supported since GCC 4.6.

BUG=

[chunyang.dai, 2014-08-13 03:35:15]

hello, 
Sven & Michael.
I found that the range-based for loops is supported
since GCC 4.6. The compilation will fail if GCC < 4.6.
So I add this condition.

please review it.

thanks.

[Benedikt Meurer, 2014-08-13 04:05:09]

On 2014/08/13 at 03:35:15, chunyang.dai wrote:
> hello, 
> Sven & Michael.
> I found that the range-based for loops is supported
> since GCC 4.6. The compilation will fail if GCC < 4.6.
> So I add this condition.
> 
> please review it.

Well, our intention is to required at least GCC 4.6 (because we want to be able
to use C++11 features at some point).

[chunyang.dai, 2014-08-13 05:57:37]

On 2014/08/13 04:05:09, Benedikt Meurer wrote:
> On 2014/08/13 at 03:35:15, chunyang.dai wrote:
> > hello, 
> > Sven & Michael.
> > I found that the range-based for loops is supported
> > since GCC 4.6. The compilation will fail if GCC < 4.6.
> > So I add this condition.
> > 
> > please review it.
> 
> Well, our intention is to required at least GCC 4.6 (because we want to be
able
> to use C++11 features at some point).

I see. we will update our system to use GCC 4.6 or higher. 

thanks

[Sven Panne, 2014-08-25 11:14:28]

On 2014/08/13 05:57:37, chunyang.dai wrote:
> I see. we will update our system to use GCC 4.6 or higher. 

Just FYI: The minimum requirement for Chrome is GCC >=4.8 or clang (see
chromium-dev mailing list), so it wouldn't hurt to update to that. :-)