package/popt: bump to version 1.19

- Drop patches (already in version) and so autoreconf
- Update hash of COPYING (license adjusted to use the original, straight
  MIT variant:
  https://github.com/rpm-software-management/popt/commit/dcec86df3cfc96d3dd3a3e9f7f1086b768d2d88f)

https://github.com/rpm-software-management/popt/compare/popt-1.18-release...popt-1.19-release



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>