kernel: Add IPC Recorder class

This class resides in Kernel mainly because that, it's hard for kernel objects to get references to the System (and therefore to the Recorder), while much easier for KernelSystem. If this is to be moved to System the code will likely get much more complex with System (or Recorder) references passed everywhere.

src/core/CMakeLists.txt

@@ -134,6 +134,8 @@ add_library(core STATIC
     hle/kernel/hle_ipc.h
     hle/kernel/ipc.cpp
     hle/kernel/ipc.h
+    hle/kernel/ipc_debugger/recorder.cpp
+    hle/kernel/ipc_debugger/recorder.h
     hle/kernel/kernel.cpp
     hle/kernel/kernel.h
     hle/kernel/memory.cpp