[blockdiag] Pushed x86 stabilisation back 30 days

Waiting for upstream stabilisation of funcparserlib.
[nwdiag] Pushed x86 stabilisation back 30 days

Waiting for upstream stabilisation of funcparserlib.
[sphinxcontrib-blockdiag] Pushed x86 stabilisation back 30 days

Waiting for upstream stabilisation of funcparserlib.
Merge branch 'f/keyword/x86'

* f/keyword/x86:
  [sphinxcontrib-blockdiag] Pushed x86 stabilisation back 30 days
  [nwdiag] Pushed x86 stabilisation back 30 days
  [blockdiag] Pushed x86 stabilisation back 30 days
Update metadata cache for upstream's eclass changes