samples: add a new sample for ARM Cortex-A15 with VFP/NEON

Sample origiannly reported and provided by dsreed on the #crostool-ng
channel on freenode. I don't have the real ID for dsreed, but the
sample is not orginally mine, but his/hers.

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

 reporter_name="Julien DUSSER"

 reporter_url="http://sourceware.org/ml/crossgcc/2008-10/msg00054.html"

 reporter_comment="Soft-float for the 405 PowerPC"