stratosphere: more result cleanup

loader: implement 8.1.0 changes

loader: refactor for R_TRY

Allow pressing buttons on all controllers in loader (closes #541)

stratosphere: TODO: panic -> std::abort()

stratosphere: stop using kernelAbove

Merge branch 'ro_dev'

stratosphere: only hold sm sessions open when needed

loader: remove more unused ro functionality

loader: remove ldr:ro (moved into ro sysmodule)

ro: implement rest of LoadNrr/LoadNrrEx

loader: refactor to use LoaderModuleInfo

loader: use libstratosphere randomness

stratosphere: custom exception handlers (reboot to fusee)

loader: fix support for 7.0.0+ games with NPDM flag bit 4 set.

atmosphere: current year is 2019

ldr_map: Silence lingering initializer warning (#500) ...

One initializer warning case that I seem to have missed (my bad).

loader: Silence Wmissing-field-initializers warnings (#499) ...

Specifying 0 as the initial entry of a structure is a C-ism. C++ permits
using an empty set of braces to signify the same behavior, silencing
missing initializer warnings.

strat: sha256 s/linux/libnx/g

strat: 0 -> ResultSuccess

strat: use TitleId defs instead of magics.

strat: use lr results instead of magics

strat: use atmosphere results instead of magics

strat: fix remaining FS result magic numbers

strat: replace kernel/dbg magic numbers with result defs

loader: Use result definitions instead of magic numbers

loader: same heap size change for gcc 8.3.0 compat

loader: Ensure code:/ unmounts if mounted.

loader: separate override_any_app (deprecate =app)

loader: begin needed support for HBL to use web browser commands