ddrescue: update to 1.19

* License changed to GPLv2+
* Although 'configure is present, it isn't autotools.

Nota bene: this requires bitbake and oe-core support for tar.lz

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>