引入flac的Vector优化

[sunyuechi]

软件包名称: flac

openEuler 仓库地址： https://gitee.com/src-openeuler/flac

FLAC is open source software that can reduce the amount of storage space needed to store digital audio signals without needing to remove information in doing so.

调研flac的Vector现状，需要测试，完善后引入到社区

参考:
Introduce Risc-V Vector Intrinsic Support