scripts: check for, and warn about an unset CT_PREFIX_DIR

The user shall provide a directory to install the toolchain into.
If he/she does not, this is an error, and shall be detected properly,
rather than relying on failure down the road.

Thanks to "Pedro I. Sanchez" <psanchez@colcan.ca> for pointing out
the issue:
http://sourceware.org/ml/crossgcc/2009-12/msg00011.html
(transplanted from e94f4ffddd1d07b3841160db71694cd19fda6b03)

debug/gdb: Add support for GDB 7.0.1 (minor release)

Signed-off-by: Joachim Nilsson <jocke@vmlinux.org>

config: don't force the vendor part in the tuple

Note however that some configurations (eg. arm-elf) will still
have the vendor part 'unknown' forced in (by config.sub).

samples: update armeb-unknown-linux-uclibcgnueabi

kernel/linux: add support for latest versions

This patch adds support for the latest Linux 2.6.32.3 kernel.

Signed-off-by: Joachim Nilsson <jocke@vmlinux.org>
[yann.morin.1998@anciens.enib.fr: keep only one long-term stable]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

libc/uClibc: add patch to fix IP frames on BE targets

Pack netinet structs to be possible to use for creating
IP frames on big-endian targets.

Signed-off-by: Joachim Nilsson <jocke@vmlinux.org>
[yann.morin.1998@anciens.enib.fr: removed getline patch, already in]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

binutils/binultils: import binutils-2.20 patches from OE

This is a set of patches for binutils-2.20 that have been "ported", or rather
shamelessly stolen, from the OpenEmbedded project:

http://cgit.openembedded.org/cgit.cgi/openembedded/tree/recipes/binutils/binutils-2.20

Tried and tested on Arm (big-endian Xscale, and little-endian i.MX27) with GCC 4.4.2

Signed-off-by: Joachim Nilsson <jocke@vmlinux.org>

complibs/mpfr: add upstream patches

cc/gcc: add new patch, fixers building on x86 for target armeb (at least!)

Patch from Ralf Wildenhues:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41818#c5

Testing thanks to Joachim Nilsson:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41818#c7

Merge.