[docs] Harmonize NAME of Task PMC
native_pbc: generate big-endian 64 bit pbcs for 6.9.0

generated on darwin (linux or bsd is also trivial) with qemu mips64
on a debian image, with gcc-multilib and --cc|ld|link="cc -mabi=64"

See https://people.debian.org/~aurel32/qemu/mips/
qemu-system-mips64 -M malta -kernel vmlinux-2.6.32-5-5kc-malta \
  -hda debian_squeeze_mips_standard.qcow2 \
  -append "root=/dev/sda1 console=tty0" &
login: user; su -; apt-get install gcc-multilib git rsync perl sudo