[pytrainer] Pushed x86 stabilisation back 30 days

Waiting for upstream stabilisation of usable pywebkitgtk.
[pytrainer] Pushed amd64 stabilisation back 45 days

Waiting for upstream stabilisation of usable pywebkitgtk.
Update metadata cache for upstream's eclass changes
Merge branches 'f/keyword/amd64' and 'f/keyword/x86'

* f/keyword/amd64:
  [pytrainer] Pushed amd64 stabilisation back 45 days

* f/keyword/x86:
  [pytrainer] Pushed x86 stabilisation back 30 days

Conflicts:
	doc/packages/app-misc.rst
	support/stabilisation.rem