Upgrade AWS SDK to the latest version

vendor/github.com/aws/aws-sdk-go/service/ec2/service.go

@@ -1,4 +1,4 @@
-// THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT.
+// Code generated by private/model/cli/gen-api/main.go. DO NOT EDIT.
 
 package ec2
 
@@ -11,13 +11,12 @@ import (
 	"github.com/aws/aws-sdk-go/private/protocol/ec2query"
 )
 
-// Amazon Elastic Compute Cloud (Amazon EC2) provides resizable computing capacity
-// in the Amazon Web Services (AWS) cloud. Using Amazon EC2 eliminates your
-// need to invest in hardware up front, so you can develop and deploy applications
-// faster.
-// The service client's operations are safe to be used concurrently.
-// It is not safe to mutate any of the client's properties though.
-// Please also see https://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15
+// EC2 provides the API operation methods for making requests to
+// Amazon Elastic Compute Cloud. See this package's package overview docs
+// for details on the service.
+//
+// EC2 methods are safe to use concurrently. It is not safe to
+// modify mutate any of the struct's properties though.
 type EC2 struct {
 	*client.Client
 }