hypervisor: Add control for dirty page logging

When creating a userspace mapping provide a control for enabling the
logging of dirty pages.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

vmm/src/memory_manager.rs

@@ -1115,6 +1115,7 @@ impl MemoryManager {
             memory_size,
             userspace_addr,
             readonly,
+            false,
         );
 
         self.vm
@@ -1168,6 +1169,7 @@ impl MemoryManager {
             0, /* memory_size -- using 0 removes this slot */
             userspace_addr,
             false, /* readonly -- don't care */
+            false, /* log dirty */
         );
 
         self.vm