ext-toolchain.sh: add option to write .config Add a new --config option to...

ext-toolchain.sh: add option to write .config Add a new --config option to generate a .config from a given toolchain, this allows for easy integration of external toolchains, e.g.

  ./scripts/ext-toolchain.sh --toolchain /opt/mips-2011.03 --cflags "-muclibc" --config atheros

to setup a ready-to-compile atheros target using the external CodeSourcery toolchain.

SVN-Revision: 29780