Add tool to copy files in to fat16 images

fat16copy.py can be used to copy files or directories in to the root of
a fat16 image.

Usage: fat16copy <image> <file> [<file> ...]

Test: Used to compose a Raspberry Pi 3 boot image
Bug: 28912590
Change-Id: I29c9eec3786e2c5cc94f9a160360bac850809a93
2 files changed