[Hammertime] Pushed x86 stabilisation back 45 days.

Waiting on upstream to stabilise git-python.
Updated metadata cache for upstream's eclass changes.
Merge branch 'feat/x86_keywording'

* feat/x86_keywording:
  [Hammertime] Pushed x86 stabilisation back 45 days.

Conflicts:
	support/stabilisation.rem