[net-libs/telepathy-qt] Sync with tree

Package-Manager: portage-2.2.12
[qtermwidget,qterminal] Add qt5 support to live ebuilds.
Merge pull request #73 from hashashini
[qt5-build.eclass] Exclude installed_cmake tests as well.

Otherwise qmake generates a make target with unsatisfiable
dependencies because the cmake subdir is excluded.

make: *** No rule to make target 'cmake-make_first',
needed by 'sub-installed_cmake-make_first'.  Stop.
Merge branch 'master' into docs