Fix memory corruption in romfs build (closes #708)

exosphere: support enabling usermode pmu regs (closes #703)

Update changelog for 0.10.0

git subrepo clone --force https://github.com/m4xw/emummc ...

subrepo:
  subdir:   "emummc"
  merged:   "bd81a674"
upstream:
  origin:   "https://github.com/m4xw/emummc"
  branch:   "develop"
  commit:   "bd81a674"
git-subrepo:
  version:  "0.4.0"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "5d6aba9"

Update emummc README

Update emummc for 9.1.0

Fix double semi-colon

Turn on fs.mitm multithreading

Bump version to 0.10.0

Increase default applet reservation size to make psel work

Implement support for 9.1.0

dmnt_cheat_vm: Correct register Restore and ClearRegs behavior ...

Previously they were performing the same behavior as the Save and
ClearSave opcode types.

ams_mitm: implement hbl_html redirection

ams_mitm: implement ns.mitm

Delete pre-rewrite ams_mitm code

ams_mitm: fix directory save bugs

fix uninitialized data access

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

shared_from_this requires public inheritance

ams_mitm: Implement emummc Nintendo folder redirection

ams_mitm: implement layeredfs

os/dd: primitive fixes

compat fixes for libnx master

avoid lambda use in shared_ptr deleters

fs.mitm: Implement bis protection

stop overriding user config on update

set_mitm: embed defaults in code, allow for missing ini

ams_mitm: Implement system settings mitm