Results: Implement namespaced, type-safe results. ...

Because I was working on multiple things at once, this commit also:
- Adds wrappers for/linker flags to wrap CXX exceptions to make them
  abort. This saves ~0x8000 of memory in every system module.
- Broadly replaces lines of the pattern if (cond) { return ResultX; }
  with R_UNLESS(!cond, ResultX());.
- Reworks the R_TRY_CATCH macros (and the result macros in general).

libstrat: namespace remaining non-namespaced code. more new-ipc updates

boot2: move to separate process

strat: statically allocate additional threads

strat: update for latest libnx commit

pm: statically allocate more resources to save memory

pm: update for new-ipc

sts: add STS_UNREACHABLE_DEFAULT_CASE()

os: implement waitable management. ...

This implements waitable management for Events (and
implements Events). It also refactors PM to use new
Event/Waitable semantics, and also adds STS_ASSERT
as a macro for asserting a boolean expression. The
rest of stratosphere has been refactored to use
STS_ASSERT whenever possible.

libstrat: namespace hossynch.hpp

ams: initial support for 9.0.0

pm: work around HOS bug

pm/sm: add ability to forward declare mitm'd services (closes #557)

pm: inform sm of title ids. remove inconsistent mitm association.

pm: actually use the flag detection code in libstratosphere

pm: fix boot2 launch logic error

pm: fix minor resource manager bugs

pm: fix missing flag clears

pm: address review comments.

pm: implement correct application thread boosting mechanism

strat: go all in on ncm::TitleId

strat: remove sizeof() / sizeof([0])

fix dumb mistake

pm: complete rewrite

Fix logic in ldr_ro_manager ...

Fix argument type for isdigit/isxdigit

stratosphere: all in on enum class CommandId

loader: completely rewrite.

sm: add HasService/HasMitm, refactor into sts::

stratosphere: prefer static waitable managers

stratosphere: more result cleanup