Fix release.sh sed of install.sh so we preserve tests against 'https://get.docker.io/'

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
Upstream-commit: 221454f315a8993a6996ba9867f98bddbdb1eb16
Component: engine

components/engine/hack/release.sh

@@ -295,7 +295,7 @@ EOF
 
 # Upload the index script
 release_index() {
-	sed "s,https://get.docker.io/,$(s3_url)/," hack/install.sh | write_to_s3 s3://$BUCKET/index
+	sed "s,url='https://get.docker.io/',url='$(s3_url)/'," hack/install.sh | write_to_s3 s3://$BUCKET/index
 }
 
 release_test() {