arndale-octa: include binaries and script to prepare u-boot image

U-boot image for Arndale Octa requires a set of proprietary blobs:
1. arndale_octa.bl1.bin
2. arndale_octa.bl2.bin
3. arndale_octa.tzsw.bin

Partition the SD Card using the already existing script: arndale-mkcard.sh
Here, assuming SD Card is detected as /dev/sdf:
 sudo sh arndale-mkcard.sh /dev/sdf

Copy the bl1, bl2, u-boot and trustzone binaries to SD Card:
 sudo sh arndale-octa-write-boot.sh ./arndale_octa.bl1.bin
 ./arndale_octa.bl2.bin ./arndale_octa.tzsw.bin ./u-boot.bin /dev/sdf