GPU: Implemented a gpu macro interpreter.

The Ryujinx macro interpreter and envydis were used as reference.

Macros are programs that are uploaded by the games during boot and can later be called by writing to their method id in a GPU command buffer.

src/video_core/CMakeLists.txt

@@ -11,6 +11,8 @@ add_library(video_core STATIC
     engines/maxwell_compute.h
     gpu.cpp
     gpu.h
+    macro_interpreter.cpp
+    macro_interpreter.h
     memory_manager.cpp
     memory_manager.h
     rasterizer_interface.h