ipset: Update to version 7.19

ipset: Update to version 7.19

- Update from version 7.17 to 7.19
- Update of nrootfile not required
- Changelog
7.19
  - build: Fix the double-prefix in pkgconfig (Sam James)

7.18
  - Add json output to list command (Thomas Oberhammer)
  - tests: hash:ip,port.t: Replace VRRP by GRE protocol (Phil Sutter)
  - tests: hash:ip,port.t: 'vrrp' is printed as 'carp' (Phil Sutter)
  - tests: cidr.sh: Add ipcalc fallback (Phil Sutter)
  - tests: xlate: Make test input valid (Phil Sutter)
  - tests: xlate: Test built binary by default (Phil Sutter)
  - xlate: Drop dead code (Phil Sutter)
  - xlate: Fix for fd leak in error path (Phil Sutter)
  - configure.ac: fix bashisms (Sam James)
  - lib/Makefile.am: fix pkgconfig dir (Sam James)

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>