Update Go AWS SDK to the latest version

vendor/github.com/aws/aws-sdk-go/private/model/api/logger.go

@@ -0,0 +1,54 @@
+// +build codegen
+
+package api
+
+import (
+	"fmt"
+	"io"
+	"sync"
+)
+
+var debugLogger *logger
+var initDebugLoggerOnce sync.Once
+
+// logger provides a basic logging
+type logger struct {
+	w io.Writer
+}
+
+// LogDebug initialize's the debug logger for the components in the api
+// package to log debug lines to.
+//
+// Panics if called multiple times.
+//
+// Must be used prior to any model loading or code gen.
+func LogDebug(w io.Writer) {
+	var initialized bool
+	initDebugLoggerOnce.Do(func() {
+		debugLogger = &logger{
+			w: w,
+		}
+		initialized = true
+	})
+
+	if !initialized && debugLogger != nil {
+		panic("LogDebug called multiple times. Can only be called once")
+	}
+}
+
+// Logf logs using the fmt printf pattern. Appends a new line to the end of the
+// logged statement.
+func (l *logger) Logf(format string, args ...interface{}) {
+	if l == nil {
+		return
+	}
+	fmt.Fprintf(l.w, format+"\n", args...)
+}
+
+// Logln logs using the fmt println pattern.
+func (l *logger) Logln(args ...interface{}) {
+	if l == nil {
+		return
+	}
+	fmt.Fprintln(l.w, args...)
+}