[Feature][ZXW-167]add lynq-at-test for using AT Command in uart

Only Configure: Yes
Affected branch: master
Affected module: unknown
Is it affected on both ZXIC and MTK:only ZXIC
Self-test: yes
Doc Update:No

Change-Id: I28283c4835a23a6560332b9b1c5597c8ec1daea7
5 files changed