package/docker-cli: fix version ldflags

The variables for the "docker version" output are located at
$(DOCKER_CLI_GOMOD)/cli/version - correct the path to these in the ldflags to
fix the following "unknown" lines in "docker version" output:

Client:
 Version:           unknown-version
 Git commit:        unknown-commit
 Built:             unknown-buildtime

Signed-off-by: Christian Stewart <christian@paral.in>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/docker-cli/docker-cli.mk

@@ -17,8 +17,8 @@ DOCKER_CLI_BUILD_TARGETS = cmd/docker
 DOCKER_CLI_GOMOD = github.com/docker/cli
 
 DOCKER_CLI_LDFLAGS = \
-	-X $(DOCKER_CLI_GOMOD)/cli.GitCommit=$(DOCKER_CLI_VERSION) \
-	-X $(DOCKER_CLI_GOMOD)/cli.Version=$(DOCKER_CLI_VERSION)
+	-X $(DOCKER_CLI_GOMOD)/cli/version.GitCommit=$(DOCKER_CLI_VERSION) \
+	-X $(DOCKER_CLI_GOMOD)/cli/version.Version=$(DOCKER_CLI_VERSION)
 
 ifeq ($(BR2_PACKAGE_DOCKER_CLI_STATIC),y)
 DOCKER_CLI_LDFLAGS += -extldflags '-static'