[release-2.1] vendor: update kvproto#8246

Merged

zz-jason merged 1 commit intopingcap:release-2.1from MyonKeminta:misono/2.1-rc5-update-kvproto

Nov 10, 2018

+184-132

Commits on Nov 9, 2018

Update kvproto
MyonKeminta
committed