[UCRT] Add casts to make GCC happy

sdk/lib/ucrt/startup/thread.cpp

···
         return nullptr;
     }
 
-    parameter.get()->_procedure = procedure;
+    parameter.get()->_procedure = reinterpret_cast<void*>(procedure);
     parameter.get()->_context   = context;
 
     // Attempt to bump the reference count of the module in which the user's
···
 {
     _VALIDATE_RETURN(procedure != nullptr, EINVAL, reinterpret_cast<uintptr_t>(INVALID_HANDLE_VALUE));
 
-    unique_thread_parameter parameter(create_thread_parameter(procedure, context));
+    unique_thread_parameter parameter(create_thread_parameter(reinterpret_cast<void*>(procedure), context));
     if (!parameter)
     {
         return reinterpret_cast<uintptr_t>(INVALID_HANDLE_VALUE);
···
 {
     _VALIDATE_RETURN(procedure != nullptr, EINVAL, 0);
 
-    unique_thread_parameter parameter(create_thread_parameter(procedure, context));
+    unique_thread_parameter parameter(create_thread_parameter((void*)procedure, context));
     if (!parameter)
     {
         return 0;