Fix static initialisation order fiasco issue for Version variables

Fixes a crash that could occur if the static constructor function for
the MainSettings.cpp TU happened to run before the variables in
Common/Version.cpp are initialised. (This is known as the static
initialisation order fiasco.)

By using wrapper functions, those variables are now guaranteed to be
constructed on first use.

Source/Core/Core/IOS/DolphinDevice.cpp

@@ -58,10 +58,10 @@ IPCReply GetVersion(const IOCtlVRequest& request)
     return IPCReply(IPC_EINVAL);
   }
 
-  const auto length = std::min(size_t(request.io_vectors[0].size), Common::scm_desc_str.size());
+  const auto length = std::min(size_t(request.io_vectors[0].size), Common::GetScmDescStr().size());
 
   Memory::Memset(request.io_vectors[0].address, 0, request.io_vectors[0].size);
-  Memory::CopyToEmu(request.io_vectors[0].address, Common::scm_desc_str.data(), length);
+  Memory::CopyToEmu(request.io_vectors[0].address, Common::GetScmDescStr().data(), length);
 
   return IPCReply(IPC_SUCCESS);
 }