samples: new PPC e300c3 sample

Gustavo wrote:

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Attached my ct-ng e300c3 toolchain config for:

powerpc-e300c3-linux-gnu [l X]
OS : linux-2.6.36.3
Companion libs : gmp-5.0.1 mpfr-3.0.0 ppl-0.10.2 cloog-ppl-0.15.10 mpc-0.8.2 libelf-0.8.13
binutils : binutils-2.21
C compiler : gcc-4.5.2 (C,C++)
C library : eglibc-2_12
Tools :
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Reported-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
["Yann E. MORIN" : updated to match new config options]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

# Blackfin specific configuration file

config ARCH_blackfin

    select ARCH_SUPPORTS_32

    select ARCH_DEFAULT_32

    select ARCH_DEFAULT_LE

    select ARCH_SUPPORT_ARCH

    select ARCH_SUPPORT_CPU

    select ARCH_SUPPORT_TUNE

    select ARCH_SUPPORT_FPU

     help

      The Blackfin architecture