[dev-qt/qtgui] add subslot operator for libxcb

Prepared bump to libxcb-1.11 (in ::x11) has already subslot, because
change ABI.

Signed-off-by: David Heidelberger <david.heidelberger@ixit.cz>
Merge pull request #82 from iXit/master
Merge branch 'master' into docs
[x11-misc/sddm] sync with tree: fix bug 524072 and temporary fix bug 523630
[razorqt-base/libqtxdg] update live ebuild, drop QT4 support
[lxqt-base/liblxqt] update live ebuild, drop QT4 support
[.travis.yml] fix portage version
[.travis.yml] fix portage version again
[app-editors/vim-qt] Delete redundant ebuild.

Package-Manager: portage-2.2.14_rc1
Merge branch 'master' of github.com:gentoo/qt
[dev-python/sip] Sync with portage.
[liblxqt-mount] update live ebuild, drop QT4 support
[razorqt-base/libqtxdg] fix indentation
[lxqt-base/lxqt-about] update live ebuild, drop QT4 support
[app-admin/lxqt-admin] update live ebuild, drop QT4 support
[lxqt-base/lxqt-common,lxqt-base/lxqt-session] update live ebuild, drop QT4 support
[razorqt-base/libqtxdg] fix dependencies
[lxqt-base/liblxqt] fix dependencies
[lxqt-base/lxqt-about] fix dependencies
[lxqt-base/lxqt-session] fix dependencies