gluon-core: use gluon release in package version string

package/gluon-core/Makefile

@@ -2,7 +2,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=gluon-core
 PKG_VERSION:=1
-PKG_RELEASE:=1.$(GLUON_CONFIG_VERSION)
+PKG_RELEASE:=1.$(GLUON_SITE_CODE)-$(GLUON_RELEASE).$(GLUON_CONFIG_VERSION)
 
 PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)