[mnemosyne] Pushed x86 stabilisation back 30 days

Waiting for upstream stabilisation of kid.
Merge branch 'feat/x86_keywording'

* feat/x86_keywording:
  [mnemosyne] Pushed x86 stabilisation back 30 days
[mnemosyne] Pushed amd64 stabilisation back 60 days

Waiting for upstream stabilisation of kid.
Merge branch 'feat/amd64_keywording'

* feat/amd64_keywording:
  [mnemosyne] Pushed amd64 stabilisation back 60 days
Update metadata cache for upstream's eclass changes