Kernel/IPC: Added a function to translate the IPC command buffer from one process to another.

Currently only CopyHandle, MoveHandle and CallingPid descriptors are implemented.

src/core/CMakeLists.txt

@@ -61,6 +61,7 @@ set(SRCS
             hle/kernel/timer.cpp
             hle/kernel/vm_manager.cpp
             hle/kernel/wait_object.cpp
+            hle/kernel/ipc.cpp
             hle/lock.cpp
             hle/romfs.cpp
             hle/service/ac/ac.cpp
@@ -247,6 +248,7 @@ set(HEADERS
             hle/kernel/event.h
             hle/kernel/handle_table.h
             hle/kernel/hle_ipc.h
+            hle/kernel/ipc.h
             hle/kernel/kernel.h
             hle/kernel/memory.h
             hle/kernel/mutex.h