Override Entrypoint picked up from the base image that breaks run commands in builder

Upstream-commit: f64dbdbe3a147f58d04b6c39c6469fdd97427098
Component: engine

components/engine/buildfile.go

@@ -279,6 +279,10 @@ func (b *buildFile) run() (string, error) {
 	b.tmpContainers[c.ID] = struct{}{}
 	fmt.Fprintf(b.out, " ---> Running in %s\n", utils.TruncateID(c.ID))
 
+	// override the entry point that may have been picked up from the base image
+	c.Path = b.config.Cmd[0]
+	c.Args = b.config.Cmd[1:]
+
 	//start the container
 	hostConfig := &HostConfig{}
 	if err := c.Start(hostConfig); err != nil {