[bleeter] Pushed x86 stabilisation back 45 days

Waiting for stabilisation of tweepy.
Update metadata cache for upstream's eclass changes
Merge branch 'feat/x86_keywording'

* feat/x86_keywording:
  [bleeter] Pushed x86 stabilisation back 45 days
[rdial] Pushed amd64 stabilisation back 60 days

Waiting for stabilisation of cov-core and prettytable.
Merge branch 'feat/amd64_keywording'

* feat/amd64_keywording:
  [rdial] Pushed amd64 stabilisation back 60 days

Conflicts:
	support/stabilisation.rem