[cpu]update xft doc

[bukejiyu]

PR types

Others

PR changes

Others

Description

增加xft使用readme

[paddle-bot[bot]]

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 55.61%. Comparing base (be5bb14) to head (179c72f). Report is 820 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #8682   +/-   ##
========================================
  Coverage    55.61%   55.61%           
========================================
  Files          620      620           
  Lines        96965    96965           
========================================
  Hits         53930    53930           
  Misses       43035    43035           

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This Pull Request is stale because it has been open for 60 days with no activity. 当前Pull Request 60天内无活动，被标记为stale。

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This Pull Request is stale because it has been open for 60 days with no activity. 当前Pull Request 60天内无活动，被标记为stale。