Parrot Security OS generic armhf image builder

* To build the image:
  * install tar gzip xz-utils gdisk wget kpartx lvm2 dosfstools coreutils make
  * put in the working directory a rootfs tarball of parrotsec
    from the parrot-arm-builder (https://github.com/ParrotSec/parrot-arm-builder)
    (according with the Makefile BASEIMG and BUILD_NUMBER)
  * run make

* Scripts:
  * Makefile
  * build_parrotsec_image.sh

* To write an image directly to a block device:
  * run "make BLOCKDEVICE=/dev/BLOCK", where BLOCK is your block device
    an example: make BLOCKDEVICE=/dev/mmcblk0 or make BLOCKDEVICE=/dev/sdb

* The script base is tuned to generate a raspberry pi image as an example,
  feel free to customize it according to your necessities.

All the source code is under GPLv3+ .