vendor: update buildkit

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

vendor/github.com/Microsoft/hcsshim/osversion/osversion_windows.go

@@ -1,50 +0,0 @@
-package osversion
-
-import (
-	"fmt"
-	"sync"
-
-	"golang.org/x/sys/windows"
-)
-
-// OSVersion is a wrapper for Windows version information
-// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724439(v=vs.85).aspx
-type OSVersion struct {
-	Version      uint32
-	MajorVersion uint8
-	MinorVersion uint8
-	Build        uint16
-}
-
-var (
-	osv  OSVersion
-	once sync.Once
-)
-
-// Get gets the operating system version on Windows.
-// The calling application must be manifested to get the correct version information.
-func Get() OSVersion {
-	once.Do(func() {
-		var err error
-		osv = OSVersion{}
-		osv.Version, err = windows.GetVersion()
-		if err != nil {
-			// GetVersion never fails.
-			panic(err)
-		}
-		osv.MajorVersion = uint8(osv.Version & 0xFF)
-		osv.MinorVersion = uint8(osv.Version >> 8 & 0xFF)
-		osv.Build = uint16(osv.Version >> 16)
-	})
-	return osv
-}
-
-// Build gets the build-number on Windows
-// The calling application must be manifested to get the correct version information.
-func Build() uint16 {
-	return Get().Build
-}
-
-func (osv OSVersion) ToString() string {
-	return fmt.Sprintf("%d.%d.%d", osv.MajorVersion, osv.MinorVersion, osv.Build)
-}