Support region cn-north-1 (#280)

* Update aws-sdk-go
* cn-north-1 AMI
* CN endpoint for instance trust policy

Author: yinshiua

ecs-cli/Godeps/Godeps.json

@@ -4,7 +4,7 @@
 // not use this file except in compliance with the License. A copy of the
 // License is located at
 //
-//	http://aws.amazon.com/apache2.0/
+//  http://aws.amazon.com/apache2.0/
 //
 // or in the "license" file accompanying this file. This file is distributed
 // on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
@@ -153,6 +153,9 @@ var template = `
     }
   },
   "Conditions": {
+    "IsCNRegion": {
+      "Fn::Equals": [ { "Ref": "AWS::Region" }, "cn-north-1" ]
+    },
     "CreateVpcResources": {
       "Fn::Equals": [
         {
@@ -163,7 +166,7 @@ var template = `
     },
     "CreateSecurityGroup": {
       "Fn::Equals": [
-				{
+        {
           "Fn::Join": [
             "",
             {
@@ -389,7 +392,11 @@ var template = `
               "Effect": "Allow",
               "Principal": {
                 "Service": [
-                  "ec2.amazonaws.com"
+                  "Fn::If": [
+                    "IsCNRegion",
+                    "ec2.amazonaws.com.cn",
+                    "ec2.amazonaws.com"
+                  ]
                 ]
               },
               "Action": [