pkgs: add new packages folder

LTIB might need some packages that did not came with
an specified BSP. So, we have a added of them here
LTIB_log: add "missing packages" instruction
LTIB_log: add manual BSP dowload instructions

Sometimes LTIb cannot find a package and it is not
in the pkgs folder either. So, one can manually download
some BSPs and copy them to the respective folder
(for LTIB is /opt/freescale/pkgs)
pkgs/*: add pme_tools packages