LibJS: Move GlobalObject to its own Object subclass

This is mostly for tidiness at the moment.

Libraries/LibJS/GlobalObject.cpp

@@ -0,0 +1,30 @@
+#include <AK/LogStream.h>
+#include <AK/String.h>
+#include <LibJS/GlobalObject.h>
+#include <LibJS/Heap.h>
+#include <LibJS/Interpreter.h>
+#include <LibJS/NativeFunction.h>
+#include <LibJS/Value.h>
+#include <stdio.h>
+
+namespace JS {
+
+GlobalObject::GlobalObject(Heap& heap)
+{
+    put("print", heap.allocate<NativeFunction>([](Interpreter&, Vector<Argument> arguments) -> Value {
+        for (auto& argument : arguments)
+            printf("%s ", argument.value.to_string().characters());
+        return js_undefined();
+    }));
+    put("gc", heap.allocate<NativeFunction>([](Interpreter& interpreter, Vector<Argument>) -> Value {
+        dbg() << "Forced garbage collection requested!";
+        interpreter.heap().collect_garbage();
+        return js_undefined();
+    }));
+}
+
+GlobalObject::~GlobalObject()
+{
+}
+
+}