add gnome-extra/krb5-auth-dialog

Added gnome-extra/krb5-auth-dialog currently missing in Gentoo tree.

Signed-off-by: Ivan Vecera <ivan@cera.cz>
add virtual/opencl

Added virtual/opencl that overrides the official one so it provides
a support for Intel GPUs.

Signed-off-by: Ivan Vecera <ivan@cera.cz>
Merge branch 'master' of github.com:ivecera/gentoo-overlay into public

* 'master' of github.com:ivecera/gentoo-overlay:
  add sys-fs/zfs with fix for bug #2320