vendor: Update minio/sha256-simd (#5433)

* vendor: Update minio/sha256-simd

* Add go module stuff

vendor/github.com/minio/sha256-simd/appveyor.yml

@@ -1,32 +0,0 @@
-# version format
-version: "{build}"
-
-# Operating system (build VM template)
-os: Windows Server 2012 R2
-
-# Platform.
-platform: x64
-
-clone_folder: c:\gopath\src\github.com\minio\sha256-simd
-
-# environment variables
-environment:
-  GOPATH: c:\gopath
-  GO15VENDOREXPERIMENT: 1
-
-# scripts that run after cloning repository
-install:
-  - set PATH=%GOPATH%\bin;c:\go\bin;%PATH%
-  - go version
-  - go env
-
-# to run your custom scripts instead of automatic MSBuild
-build_script:
-  - go test .
-  - go test -race .
-
-# to disable automatic tests
-test: off
-
-# to disable deployment
-deploy: off