[dev-qt/qtcore] Add journald logging support (qtbase f81de394)

Package-Manager: portage-2.2.14
Merge pull request #86 from eliasp/dev-qt_qtcore_journald-logging

[dev-qt/qtcore] Add journald logging support (qtbase f81de394)
[dev-qt/*:5] Bump to 5.4.0 final
[dev-qt] 5.4.0 is in the main tree.

Package-Manager: portage-2.2.15
Delete unused patches.
[qt5-build.eclass] Drop 5.3 support.
x11-themes/qtcurve: kf5 and multilib fixes
Add QtWebEngine ebuild
Add QtWebChannel ebuild