FAB-6351 Fix orderer version command

The orderer version command is currently
not working correctly when the orderer is
built via make release.  Turns out that
the metadata flags were not being properly
set when running `make release`.
`make orderer` works as expected.

Change-Id: I582362e08c791abcc14e083aecc5d888caeb57d8
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>

Makefile

@@ -348,6 +348,8 @@ release/%/bin/cryptogen: $(PROJECT_FILES)
 	mkdir -p $(@D)
 	$(CGO_FLAGS) GOOS=$(GOOS) GOARCH=$(GOARCH) go build -o $(abspath $@) -tags "$(GO_TAGS)" -ldflags "$(GO_LDFLAGS)" $(pkgmap.$(@F))
 
+release/%/bin/orderer: GO_LDFLAGS = $(patsubst %,-X $(PKGNAME)/common/metadata.%,$(METADATA_VAR))
+
 release/%/bin/orderer: $(PROJECT_FILES)
 	@echo "Building $@ for $(GOOS)-$(GOARCH)"
 	mkdir -p $(@D)