[eclass] Disable cmake-related tests wrt bug #474004.
[dev-qt/qtsvg] Disable broken test wrt bug #474004.

Package-Manager: portage-2.2.10
[dev-qt/qtgui:5] Fix xkb and xkbcommon support.

Package-Manager: portage-2.2.10
[qt5-build.eclass] Set correct *FLAGS and toolchain on qmake call

Fixes bug #490254