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="Yann E. MORIN"

 reporter_url="http://ymorin.is-a-geek.org/projects/crosstool"

 reporter_comment="EXPERIMENTAL MIPS-64 n32 toolchain."