Patch tracking method

[Michael Hope]

I've fleshed out a potential way of tracking patches at:
 https://wiki.linaro.org/WorkingGroups/ToolChain/PatchTracking#Method%201

It's not too bad if you're a developer.  The extra steps are:
 * Create a ticket
 * Mark that ticket as affecting upstream
 * Change the status as the patch evolves
 * Mark where the patch lands when finished

This is all done through Launchpad's existing interface.

Thoughts?

-- Michael