libstratosphere: use from /atmosphere/libraries

Improve exception wrapping

fs.mitm: fix infinite loop due to off-by-one in romfs read comparison

Fix memory corruption in romfs build (closes #708)

Fix double semi-colon

Turn on fs.mitm multithreading

Increase default applet reservation size to make psel work

ams_mitm: implement hbl_html redirection

ams_mitm: implement ns.mitm

ams_mitm: fix directory save bugs

ams_mitm: Implement savedata redirection

ams_mitm: add titles dir compat shim (to remove in 0.10.1)

ams_mitm: implement automatic backups of biskeys/cal0

ams_mitm: Implement emummc Nintendo folder redirection

ams_mitm: implement layeredfs

fs.mitm: Implement bis protection

set_mitm: embed defaults in code, allow for missing ini

ams_mitm: Implement system settings mitm

ams_mitm: Implement set:sys firmwareversion mitm

Implement set_mitm

ams_mitm: implement hid mitm

mitm/cfg: pass around override status for decision-making

ams_mitm: implement bpc:mitm

ams_mitm: begin skeleton refactor

namespace sts -> namespace ams ...

namespace sts::ams -> ams::exosphere, ams::.

This is to facilitate future use of ams:: namespace code in
mesosphere, as we'll want to include ams::util, ams::result, ams::svc...

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).

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.

mitm: fix long-standing C descriptor issue.

libstrat: namespace hossynch.hpp