[usecase-embedding] Improve the pack.sh of embeddingAPI sample

Impacted tests(approved): new 0, update 0, delete 0
Unit test platform: [Android]
Unit test result summary: pass 10, fail 0, block 0
Merge pull request #780 from zhuyongyong/yongzhu/embeddingAPI-sample/improve

[usecase-embedding] Improve the pack.sh of embeddingAPI sample