package/wpa_supplicant: security bump version to 2.9

package/wpa_supplicant: security bump version to 2.9

Fixes https://w1.fi/security/2019-6/

Removed patch applied upstream:
http://w1.fi/cgit/hostap/commit/?id=f2973fa39d6109f0f34969e91551a98dc340d537

Removed all other upstream patches which are included in this release.

Release notes:
http://lists.infradead.org/pipermail/hostap/2019-April/039979.html
http://lists.infradead.org/pipermail/hostap/2019-August/040373.html

Support for the old dbus interface was removed upstream:
http://w1.fi/cgit/hostap/commit/?id=6a8dee76d4090287c016680c009b1334e01b5fbd

Removed Config.in option, removed _NEW from remaining dbus option,
select BR2_PACKAGE_DBUS when needed and added Config.in.legacy options.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>