Fix input layer's quant scale always be zero when tmfile converted fr…

[crouchggj]

…om Caffe model

[codecov]

Codecov Report

Merging #1045 (6b025b8) into tengine-lite (6c66bb0) will not change coverage.
The diff coverage is n/a.

❗ Current head 6b025b8 differs from pull request most recent head 1f6c9ea. Consider uploading reports for the commit 1f6c9ea to get more accurate results

@@              Coverage Diff              @@
##           tengine-lite    #1045   +/-   ##
=============================================
  Coverage         47.33%   47.33%           
=============================================
  Files               409      409           
  Lines             29898    29898           
=============================================
  Hits              14151    14151           
  Misses            15747    15747           

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[kalcohol]

LGTM