complibs/gmp: bump version

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
complibs/mpfr: bump version

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
cc/gcc: modify to build gcc-4.8-based cross-tools

Building cross-tool based on gcc-4.8 fails while "Installing
pass-2 core C compiler", because building libgcc.mvars needs
libbacktrace.a that gcc.sh doesn't build. This patch inserts
a few lines configuring, and making libbacktrace into gcc.sh
to build gcc-4.8-based cross-tools successfully.

Reported-by: Plotnikov Dmitry <leitz@ispras.ru>
Signed-off-by: Jongsung Kim <neidhard.kim@lge.com>
Message-Id: <201305031831.33395.neidhard.kim@lge.com>
Patchwork-Id: 241258
cc/gcc: add 4.7.3 and 4.6.4 bug-fixes releases

Bring the appropriate patches along, too.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
kernel/linux: bump versions

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>