Build same product branch as stack-docker branch

Toby McLaughlin · Toby McLaughlin · commit 55663b60f23d · 2017-07-06T08:53:00.000+02:00
diff --git a/Makefile b/Makefile
@@ -11,7 +11,7 @@ endif
 export STAGING_BUILD_NUM
 
 ifndef BRANCH
-BRANCH := master
+BRANCH := $(shell git rev-parse --abbrev-ref HEAD)
 endif
 
 TARGETS := elasticsearch logstash kibana beats
