[Linux] Implement KSM Kernel Samepage Merging with Maps (#4601)

* KSM work

* Windows fixes

* Add KSM logging, cleanup

* Cleanup raycast logging

common/CMakeLists.txt

@@ -98,6 +98,7 @@ SET(common_sources
     json/json.hpp
     json/jsoncpp.cpp
     zone_store.cpp
+    memory/ksm.hpp
     net/console_server.cpp
     net/console_server_connection.cpp
     net/crc32.cpp