Revendor github.com/sirupsen/logrus to v1.0.3

logrus v1.0.3 was the first release that include the change in
terminal_windows.go that stops exec'ing "cmd ver" to obtain the version
information and rather uses the x/sys/crypto/terminal.IsTerminal on the
console fd. On Windows this is a significant performance difference to
avoid the additional process activation of the "cmd ver" for each
invocation of the shim/runhcs executables.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>

vendor/github.com/sirupsen/logrus/logger.go

@@ -25,7 +25,7 @@ type Logger struct {
 	Formatter Formatter
 	// The logging level the logger should log at. This is typically (and defaults
 	// to) `logrus.Info`, which allows Info(), Warn(), Error() and Fatal() to be
-	// logged. `logrus.Debug` is useful in
+	// logged.
 	Level Level
 	// Used to sync writing to the log. Locking is enabled by Default
 	mu MutexWrap
@@ -312,6 +312,6 @@ func (logger *Logger) level() Level {
 	return Level(atomic.LoadUint32((*uint32)(&logger.Level)))
 }
 
-func (logger *Logger) setLevel(level Level) {
+func (logger *Logger) SetLevel(level Level) {
 	atomic.StoreUint32((*uint32)(&logger.Level), uint32(level))
 }