[kde-base/libksysguard] Virtual X is required for tests.

Package-Manager: portage-2.2.8-r1
[eclass] Add kde5-functions.
[eclass] Switch to kde5-functions.
[kde-frameworks/threadweaver] Restrict tests as they hang

Package-Manager: portage-2.2.10
[kde-base/ksysguard] New package.

Package-Manager: portage-2.2.8-r1
[eclass] Enable doxygen by default in kde-frameworks category only.
[eclass] Rename kde-frameworks to kde5.