M5StickV & V-Training Updates

[m5stack]

time : 2019.8.26

1. Change the number of training pictures，120 reduced to 35.

2. Add SD write error prompt

more information and new program file pls click the link to view:

Tutorial: https://docs.m5stack.com/#/en/related_documents/v-training
Program Flie: https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/VTraining-Client-VerA02B01.zip