scripts: Add uapi header import script

Add a script to automate importing Linux UAPI headers from kernel source.
The script handles dependency resolution and creates a commit with proper
attribution, similar to the ethtool project approach.

Usage:
    $ LINUX_GIT="$LINUX_PATH" iproute2-import-uapi [commit]

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
1 file changed