According to bi-weekly meetings of openEuler Arm SIG, add several contributors to participate in review those PR related to Arm arch.

Name list are following below:
Xu Yan @xuyan213 (Phytium)
Yuan Xia @yuan0927 (Phytium)
Liu Yonglong @Yonglong Liu (Hisilicon)

Signed-off-by: Jiakun Shuai shuaijiakun1288@phytium.com.cn