buildroot

qjson: bump version

Remove useless empty line.
Update the patch and its name.

We change from a release from Nov 2012 to a commit, because the project
and there has been quite a number of commits since then.

The patch will be sent upstream along with a request for a new release.

Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>