externals: Update catch to v2.1.1

memory: Replace all memory hooking with Special regions

travis: Remove CMAKE_OSX_ARCHITECTURES argument

Unicorn only builds a x86_64 library, without a x86_64h slice. We can't link against
x86_64-only in this manner for static libraries.

Added webhook notifications to TravisCI build.

Install Linux icon in hicolor instead of pixmaps

Fix typo for dependent options

hicolor is the preferred location for applications. See https://specifications.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html#directory_layout

Same as https://github.com/citra-emu/citra/pull/3007

time: Implement ISteadyClock::GetCurrentTimePoint

Improve IPC, unify Domains and Sessions, and add validation

* Updated the audout:u and IAudioOut, now it might work with RetroArch without trigger an assert, however it's not the ideal implementation

* Updated the audout:u and IAudioOut, now it might work with RetroArch without trigger an assert, however it's not the ideal implementation

* audout:u OpenAudioOut implementation and IAudioOut cmd 1,2,3,4,5 implementation

* using an enum for audio_out_state as well as changing its initialize to member initializer list

* Minor fixes, added Service_Audio for LOG_*, changed PcmFormat enum to EnumClass

* Minor fixes, added Service_Audio for LOG_*, changed PcmFormat enum to EnumClass

* added missing Audio loggin subclass, minor fixes, clang comment breakline

* Solving backend logging conflict

* minor fix

* Fixed duplicated Service NVDRV in backend.cpp, my bad

Fix time returning epoch time in milliseconds rather than in seconds

logging: add missing NVDRV subclass to macro list

Correct Spelling

IPC: Don't create unnecessary ports when returning sub interfaces.

 AppletOE: Stubbed CreateManagedDisplayLayer to create a new layer in the default display.