Provides two options when building RPCS3
USE_SYSTEM_FFMPEG BOOL (default: OFF)
USE_SYSTEM_LIBPNG BOOL (default: OFF)
These options lets the user select between the system provided and builtin libraries of ffmpeg and libpng to overcome possible system issues.
Also adds support for older libpng releases if the user doesn't have libpng 1.5 or higher.
* Error codes are now properly handled
* Couple more functions implemented
* Support for setting certain socket information
* socketselect() handles Unix waiting behaviour on Windows
* accept() fixed
* Optimizations
1) Some headers simplified for better compilation time
2) Some templates simplified for smaller executable size
3) Eliminate std::future to fix compilation for mingw64
4) PKG installation can be cancelled now
5) cellGame fixes
6) XAudio2 fix for mingw64
7) PPUInterpreter bug fixed (Clang)
* any_pod<> implemented
Aliases: any16, any32, any64
rsx::make_command fixed