[Buildroot] Glibc instead of uclibc

[sjhill at realitydiluted.com]

> So is not possible to use the toolchain that is currently installed on my
> linux pc?
> Must I download binutils, gcc etc etc to compile a brand new toolchain
> (following the instructions provided in some cross-compiler how-to)?
> 
You can certainly use your installed toolchain, yes. Configure buildroot
to use an external toolchain, specify a prefix of '/usr/bin' for the
toolchain/compiler and see what happens.

-Steve