What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind bug
/kind task
/kind feature

What does this PR do / why do we need it:
fix resnext_50 segment bug

Which issue(s) this PR fixes:

Fixes #
#I3QG2D:fix resnext_50 segment bug in mindspore lite
Special notes for your reviewers: