Replace minio-go with aws-sdk-go for s3-compatible log backend (#670)

* Logs should support specifying region when using S3-compatible object store

* Use aws-sdk-go client for s3 backed logstore

* fixes vendor with aws-sdk-go dependencies

vendor/github.com/aws/aws-sdk-go/service/codebuild/errors.go

@@ -0,0 +1,37 @@
+// Code generated by private/model/cli/gen-api/main.go. DO NOT EDIT.
+
+package codebuild
+
+const (
+
+	// ErrCodeAccountLimitExceededException for service response error code
+	// "AccountLimitExceededException".
+	//
+	// An AWS service limit was exceeded for the calling AWS account.
+	ErrCodeAccountLimitExceededException = "AccountLimitExceededException"
+
+	// ErrCodeInvalidInputException for service response error code
+	// "InvalidInputException".
+	//
+	// The input value that was provided is not valid.
+	ErrCodeInvalidInputException = "InvalidInputException"
+
+	// ErrCodeOAuthProviderException for service response error code
+	// "OAuthProviderException".
+	//
+	// There was a problem with the underlying OAuth provider.
+	ErrCodeOAuthProviderException = "OAuthProviderException"
+
+	// ErrCodeResourceAlreadyExistsException for service response error code
+	// "ResourceAlreadyExistsException".
+	//
+	// The specified AWS resource cannot be created, because an AWS resource with
+	// the same settings already exists.
+	ErrCodeResourceAlreadyExistsException = "ResourceAlreadyExistsException"
+
+	// ErrCodeResourceNotFoundException for service response error code
+	// "ResourceNotFoundException".
+	//
+	// The specified AWS resource cannot be found.
+	ErrCodeResourceNotFoundException = "ResourceNotFoundException"
+)