[gitflow] Pushed x86 stabilisation back 45 days.

Waiting on upstream to stabilise shflags.
[httpshell] Pushed x86 stabilisation back 45 days.

Waiting on upstream to stabilise oauth2.
Updated metadata cache for upstream's eclass changes.
Merge branch 'feat/x86_keywording'

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

Conflicts:
	support/stabilisation.rem
Updated metadata cache for upstream's eclass changes.