[PATCH 1/3] gitignore: Only ignore quilt files at the root of the repository

[Finucane, Stephen]

> So, say, a 'series' directory in the project (added in a later patch)
> doesn't get ignored.
> 
> Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>

Acked-by: Stephen Finucane <stephen.finucane at intel.com>