remove `-i` flag from GOFLAGS (#7778)
remove `-i` flag from GOFLAGS (#7778)

this flag is not needed for Go versions >=1.10 and creates problems
while building. see https://github.com/golang/go/issues/27285#issuecomment-424382413
kubatyszko/gitea,sapk-fork/gitea,typeless/gitea,sapk-fork/gitea,vCaesar/gitea,lafriks/gitea,vdbt/gitea,kubatyszko/gitea,cez81/gitea,cez81/gitea,go-gitea/gitea,vCaesar/gitea,go-gitea/gitea,kubatyszko/gitea,go-gitea/gitea,typeless/gitea,sapk-fork/gitea,sapk-fork/gitea,typeless/gitea,cez81/gitea,vdbt/gitea,lafriks/gitea,lafriks/gitea,typeless/gitea