Add suffix to experimental builds version

Signed-off-by: Arnaud Porterie <arnaud.porterie@docker.com>
Upstream-commit: 78578125ce6c534253d8d60c242d6993c569449e
Component: engine

components/engine/integration-cli/docker_cli_experimental_test.go

@@ -0,0 +1,24 @@
+// +build experimental
+
+package main
+
+import (
+	"os/exec"
+	"strings"
+
+	"github.com/go-check/check"
+)
+
+func (s *DockerSuite) TestExperimentalVersion(c *check.C) {
+	versionCmd := exec.Command(dockerBinary, "version")
+	out, _, err := runCommandWithOutput(versionCmd)
+	if err != nil {
+		c.Fatalf("failed to execute docker version: %s, %v", out, err)
+	}
+
+	for _, line := range strings.Split(out, "\n") {
+		if strings.HasPrefix(line, "Client version:") || strings.HasPrefix(line, "Server version:") {
+			c.Assert(line, check.Matches, "*-experimental")
+		}
+	}
+}