bash_3.2.x: update recipe version to match what we're shipping

bash_3.2.x: update recipe version to match what we're shipping

Make sure the recipe version matches what we're
actually shipping, so that tools like cve-check
can do the right thing.

Rather than fetching version 3.2.48 and applying all
patches up to and including version 3.2.57, we just
fetch the latter in the first place.

Signed-off-by: André Draszik <adraszik@tycoint.com>
Acked-by: Sylvain Lemieux <slemieux@tycoint.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>