wireshark: bump to version 2.6.4

wireshark: bump to version 2.6.4

- Remove first patch (inet_pton test removed since version 2.5.0 and
  https://github.com/wireshark/wireshark/commit/12d63c428f973b1f7e04ad58d432d778e2035a9a)
- Remove second patch (already in version, since
  https://github.com/wireshark/wireshark/commit/3761ef378537f6a9e0424f7cbded7e7403ba425c)
- Remove WIRESHARK_AUTORECONF=yes as configure.ac is not patched anymore
- gcrypt is a mandatory dependency since version 2.4.0 and
  https://github.com/wireshark/wireshark/commit/6b84ddee83e70aff944da084129624226b7a32fa
- geoip support has been replaced by maxminddb since version 2.5.0 and
  https://github.com/wireshark/wireshark/commit/a1da75c554881667dd92e11f098630f2d604872b
- Drop includedir "hack", this is not needed anymore and wireshark is
  now installing files in target. With this hack, build fails on:
  wireshark: installs files in /home/fabrice/buildroot/output/target//home/fabrice/buildroot/output
  package/pkg-generic.mk:310: recipe for target '/home/fabrice/buildroot/output/build/wireshark-2.6.4/.stamp_target_installed' failed
- Disable all new optional features

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Arnout: keep optional dependencies alphabetic on Config.in name;
         add comment of libgcrypt -> libgpg-error dependency.]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>