[Bugfix][bug-view-256]Resolve the issue of differential package downgrade failure

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

Change-Id: I8547380533eee3782fd67493cda3919f0eb08111
2 files changed