[Buildroot] Reduce toolchain options

[Thomas Petazzoni]

Dear Gustavo Zacarias,

On Wed, 11 Mar 2015 13:14:33 -0300, Gustavo Zacarias wrote:

> How about we kill non-lfs and non-ipv6 toolchains?

I fully support this idea.

> It's 2015 after all, and the size delta is minor:
> 
> tar file delta, arm926 uclibc+busybox
> =====================================
> Threading (NPTL)        +153600 bytes

Ah, too bad. I was hoping to also suggest to remove the no-thread
solution. The number of packages that need threads these days is really
enormous, and I'm not really sure in practice how many people are doing
no-thread based systems.

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com