kernel/process: Make the handle table per-process

In the kernel, there isn't a singular handle table that everything gets
tossed into or used, rather, each process gets its own handle table that
it uses. This currently isn't an issue for us, since we only execute one
process at the moment, but we may as well get this out of the way so
it's not a headache later on.

src/core/hle/kernel/process.h

@@ -13,6 +13,7 @@
 #include <boost/container/static_vector.hpp>
 #include "common/bit_field.h"
 #include "common/common_types.h"
+#include "core/hle/kernel/handle_table.h"
 #include "core/hle/kernel/object.h"
 #include "core/hle/kernel/thread.h"
 #include "core/hle/kernel/vm_manager.h"
@@ -142,6 +143,16 @@ public:
         return vm_manager;
     }
 
+    /// Gets a reference to the process' handle table.
+    HandleTable& GetHandleTable() {
+        return handle_table;
+    }
+
+    /// Gets a const reference to the process' handle table.
+    const HandleTable& GetHandleTable() const {
+        return handle_table;
+    }
+
     /// Gets the current status of the process
     ProcessStatus GetStatus() const {
         return status;
@@ -294,6 +305,9 @@ private:
     /// specified by metadata provided to the process during loading.
     bool is_64bit_process = true;
 
+    /// Per-process handle table for storing created object handles in.
+    HandleTable handle_table;
+
     std::string name;
 };