samples: add new m68k-unknown-uclinux-uclibc sample

Signed-off-by: "Esben Haabendal" <esben@haabendal.dk>
[yann.morin.1998@free.fr: upgrade to using gcc-4.7.2]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Message-Id: <87r4pod1hm.fsf@arh128.prevas.dk>
PatchWork-Id: 187182

# Compute Alpha-specific values

CT_DoArchTupleValues () {

    # The architecture part of the tuple:

    CT_TARGET_ARCH="${CT_ARCH}${CT_ARCH_ALPHA_VARIANT}"

}