System: Reinitialize code cache on hw settings change/disc swap

Basically, anything which could allocate large amounts of memory and
potentially overlap with our fastmem area.

src/core/system.cpp

@@ -1609,6 +1609,10 @@ bool InsertMedia(const char* path)
     UpdateMemoryCards();
   }
 
+  // reinitialize recompiler, because especially with preloading this might overlap the fastmem area
+  if (g_settings.IsUsingCodeCache())
+    CPU::CodeCache::Reinitialize();
+
   return true;
 }