fusee_cpp: validate mtc overlay before jumping to it.

mtc will jump back to us, so we need a compatible binary.

This also makes some changes to our layout to minimize the likelihood of
an incompatible mtc binary (I made some arbitrary .text/.rodata/.rwdata changes)
and saw identical mtc binaries, so hopefully this all works out.

fusee_cpp/program/source/fusee_stratosphere.cpp

@@ -725,6 +725,8 @@ namespace ams::nxboot {
                 AddNogcPatches(fs_meta, fs_version);
             }
 
+            /* TODO ams.tma2: add mount_host patches. */
+
             /* Add generic patches. */
             {
                 /* Create patch path. */