Bump AWS SDK

Fixes https://github.com/docker/distribution/issues/3097

Signed-off-by: Yong Wen Chua <lawliet89@users.noreply.github.com>

vendor/github.com/aws/aws-sdk-go/service/cloudfront/sign/policy.go

@@ -32,6 +32,19 @@ func (t AWSEpochTime) MarshalJSON() ([]byte, error) {
 	return []byte(fmt.Sprintf(`{"AWS:EpochTime":%d}`, t.UTC().Unix())), nil
 }
 
+// UnmarshalJSON unserializes AWS Profile epoch time.
+func (t *AWSEpochTime) UnmarshalJSON(data []byte) error {
+	var epochTime struct {
+		Sec int64 `json:"AWS:EpochTime"`
+	}
+	err := json.Unmarshal(data, &epochTime)
+	if err != nil {
+		return err
+	}
+	t.Time = time.Unix(epochTime.Sec, 0).UTC()
+	return nil
+}
+
 // An IPAddress wraps an IPAddress source IP providing JSON serialization information
 type IPAddress struct {
 	SourceIP string `json:"AWS:SourceIp"`
@@ -169,11 +182,10 @@ func NewCannedPolicy(resource string, expires time.Time) *Policy {
 
 // encodePolicy encodes the Policy as JSON and also base 64 encodes it.
 func encodePolicy(p *Policy) (b64Policy, jsonPolicy []byte, err error) {
-	jsonPolicy, err = json.Marshal(p)
+	jsonPolicy, err = encodePolicyJSON(p)
 	if err != nil {
 		return nil, nil, fmt.Errorf("failed to encode policy, %s", err.Error())
 	}
-
 	// Remove leading and trailing white space, JSON encoding will note include
 	// whitespace within the encoding.
 	jsonPolicy = bytes.TrimSpace(jsonPolicy)

vendor/github.com/aws/aws-sdk-go/service/cloudfront/sign/policy_json_1_6.go

@@ -0,0 +1,14 @@
+// +build !go1.7
+
+package sign
+
+import (
+	"bytes"
+	"encoding/json"
+)
+
+func encodePolicyJSON(p *Policy) ([]byte, error) {
+	src, err := json.Marshal(p)
+	// Convert \u0026 back to &
+	return bytes.Replace(src, []byte("\\u0026"), []byte("&"), -1), err
+}

vendor/github.com/aws/aws-sdk-go/service/cloudfront/sign/policy_json_1_7.go

@@ -0,0 +1,16 @@
+// +build go1.7
+
+package sign
+
+import (
+	"bytes"
+	"encoding/json"
+)
+
+func encodePolicyJSON(p *Policy) ([]byte, error) {
+	buffer := &bytes.Buffer{}
+	encoder := json.NewEncoder(buffer)
+	encoder.SetEscapeHTML(false)
+	err := encoder.Encode(p)
+	return buffer.Bytes(), err
+}

vendor/github.com/aws/aws-sdk-go/service/cloudfront/sign/sign_cookie.go

@@ -179,7 +179,7 @@ func cookieURLScheme(u string) (string, error) {
 //
 //    // Or get Signed cookies for a resource that will expire in 1 hour
 //    // and set path and domain of cookies
-//    cookies, err := s.Sign(policy, func(o *sign.CookieOptions) {
+//    cookies, err := s.SignWithPolicy(policy, func(o *sign.CookieOptions) {
 //        o.Path = "/"
 //        o.Domain = ".example.com"
 //    })