Add support for applying local patches to third_party repos when we don't have a clone
Add support for applying local patches to third_party repos when we don't have a clone

This is currently used for the Blink repo at src\third_party\WebKit, which needs a small
change in a gyp file for proper bindings generation.
Creating a clone just for this change is overkill, and the repo is scheduled to be merged
into Chromium soon anyway, so just use patches in the meantime.
If we end up making more changes we can always set up a clone on github, but let's try
to avoid it for now.
(nb: Blink doesn't have platform-specific code anymore so further changes are unlikely)

kromain/chromium-tools,kromain/chromium-tools,kromain/chromium-tools,kromain/chromium-tools