kernel: Copy process name on fork()

kernel/src/sys/exec.cpp

@@ -119,6 +119,7 @@ Result<u64> sys_fork(Registers* regs, SyscallArgs)
     thread->is_kernel = false;
     thread->parent_id = current->id;
     thread->fp_data.save();
+    thread->name = current->name;
 
     for (int i = 0; i < FD_MAX; i++) { thread->fd_table[i] = current->fd_table[i]; }