package/webkitgtk: security bump to version 2.26.2

package/webkitgtk: security bump to version 2.26.2

This is a minor release which includes fixes for CVE-2019-8812 and
CVE-2019-8814.

This release also fixes the build with WebDriver disabled and without
X11, so "0001-GTK-ANGLE-s-eglplatform.h-is-build-broken-with-DENAB.patch"
and "0002-WPE-GTK-Build-fails-with-ENABLE_WEBDRIVER-OFF.patch" are not
needed anymore (and therefore removed). There is also a performance
improvement for a regression related to fallback font selection, and a
couple of small fixes. The full release notes are available at:

  https://webkitgtk.org/2019/11/06/webkitgtk2.26.2-released.html

The detailed security advisory can be found at:

  https://webkitgtk.org/security/WSA-2019-0006.html

Signed-off-by: Adrian Perez de Castro <aperez@igalia.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>