Fix up proofs after word lemma moves

Isabelle2018 arm: AInvs

Isabelle2018: new "op x" syntax; now is "(x)"

(result of "isabelle update_op -m <dir>")

x64: more abstract specs and invariants for ASIDs

Many proof repairs.

Initial proof updates for combinator changes.

Remove valid_arch_objs

now that we have valid_vspace_objs to express validiy of
vspace objects, we do not need valid_arch_objs: we have
valid_objs to state the validity of non-vspace arch objects.

arm ainvs: Update for create_mapping_entries changes

ainvs: reintroduce second_level_tables all over the place, update generic Arch_AI and various ArchArch_AI's to match

x64: fix ArchArch_AI

Also includes some corrections to the abstract specification, and minor
improvements to some existing proofs.

x64: remove arch-specific detail that crept back into Untyped_AI

wp_cleanup: update proofs for new wp behaviour

The things that usually go wrong:
- wp fall through: add +, e.g.
apply (wp select_wp) -> apply (wp select_wp)+

- precondition: you can remove most hoare_pre, but wpc still needs it, and
sometimes the wp instance relies on being able to fit a rule to the
current non-schematic precondition. In that case, use "including no_pre"
to switch off the automatic hoare_pre application.

- very rarely there is a schematic postcondition that interferes with the
new trivial cleanup rules, because the rest of the script assumes some
specific state afterwards (shouldn't happen in a reasonable proof, but
not all proofs are reasonable..). In that case, (wp_once ...)+ should
emulate the old behaviour precisely.

Isabelle2016-1: rename free variables to avoid capture

Isabelle2016-1: update references to renamed constants and facts

SELFOUR-444: Finished InfoFlow and DRefine.

SELFOUR-444: AInvs proven for preemptible retype.

SELFOUR-421: fix coding style

arch_split: give some vspace concepts more generic names

In particular rename "pd" to "vspace", when the pd represents
an address space.

arch_split: invariants: split Arch_AI [VER-574]

arch_split: skeleton arch files for AInvs