This patch removes the custom output name option that is handled properly only
in the master branch of go-bindata-assetfs (see https://github.com/elazarl/go-bindata-assetfs/pull/32)
diff --git a/Makefile b/Makefile
index 8a72e5f70..4055122f4 100644
--- a/Makefile
+++ b/Makefile
@@ -118,7 +118,7 @@ update-plugins:

 static-assets:
	@echo "--> Generating static assets"
-	@go-bindata-assetfs -o bindata_assetfs.go -pkg http -prefix pkg -modtime 1480000000 -tags ui ./pkg/web_ui/...
+	@go-bindata-assetfs -pkg http -prefix pkg -modtime 1480000000 -tags ui ./pkg/web_ui/...
	@mv bindata_assetfs.go http
	@$(MAKE) -f $(THIS_FILE) fmt