Make address spaces not cloned by default

kernel/src/memory/AddressSpace.cpp

@@ -9,6 +9,7 @@ AddressSpace AddressSpace::create()
 {
     AddressSpace result;
     result.m_pml4 = (PageTable*)PMM::request_page();
+    result.m_cloned = false;
     VMM::install_kernel_page_directory_into_address_space(result);
     return result;
 }