lmem: Implement UnitHeap, ExpHeap (#823) ...

* lmem: implement ExpHeap

* lmem: Implement Slab^H^H^H^HUnitHeap

libstrat: fix unconverted _WITH_ASSERTs

ams: revamp assertion system

kern: use TinyMT instead of mt19937_t

vapours: add time primitives, fix result name

find -exec sed -i'' -e 's/2018-2019 Atmo/2018-2020 Atmo/g' {} +

util::IntrusiveList: assert member referencing is correct

util: make offsetof/parent-of-member actually constexpr

ams.bpc: fix report serialization

ams: use bitpack for api version

strat: use util::FourCC where relevant

meso: skeleton libmesosphere in prep for kernelldr dev

sf: fix support for automatic recvlist buffers

remove title_id removal TODO

cfg: Allow more flexible hbl configuration

Fix another off-by-one in TinyMT init calcs

tinymt: correct init iter count

random: use TinyMT instead of XorShift

kvdb: correct condition inversion in kvdb::Archive

git subrepo clone https://github.com/Atmosphere-NX/Atmosphere-libs libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "07af583b"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "07af583b"
git-subrepo:
  version:  "0.4.0"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "5d6aba9"