Merge pull request #116 from andyzhangx/export-image-name

allow export registry name

Author: k8s-ci-robot

Diff for: build.make

@@ -20,7 +20,7 @@
 
 # This is the default. It can be overridden in the main Makefile after
 # including build.make.
-REGISTRY_NAME=quay.io/k8scsi
+REGISTRY_NAME?=quay.io/k8scsi
 
 # Can be set to -mod=vendor to ensure that the "vendor" directory is used.
 GOFLAGS_VENDOR=