fs.mitm: WIP LayeredFS impl (NOTE: UNUSABLE ATM)

Also greatly refactors libstratosphere, and does a lot of other things.
There is a lot of code in this one.

stratosphere/loader/source/ldr_process_creation.cpp

@@ -186,6 +186,9 @@ Result ProcessCreation::CreateProcess(Handle *out_process_h, u64 index, char *nc
         }
     }
     
+    /* Send the pid/tid pair to anyone interested in man-in-the-middle-attacking it. */
+    Registration::AssociatePidTidForMitM(index);
+    
     rc = 0;  
 CREATE_PROCESS_END:
     if (R_SUCCEEDED(rc)) {