Jenkins: add stages

Jenkinsfile

@@ -3,9 +3,9 @@ def build_docker(name) {
     echo "Build image ${image}"
 	def pref = ""
     if (env.DOCKER_PREFIX) {
-        pref = "${env.DOCKER_PREFIX}/"
+        pref = "--build-arg DOCKER_PREFIX=${env.DOCKER_PREFIX}/"
 	}
-	def args = "--build-arg DOCKER_PREFIX=${pref} --build-arg LIBS_BUILD_NUMBER=${env.BUILD_NUMBER} --build-arg JOBS_COUNT=4"
+	def args = "${pref} --build-arg LIBS_BUILD_NUMBER=${env.BUILD_NUMBER} --build-arg JOBS_COUNT=4"
 	dir ("docker/${image}") {
 	    //echo "build ${image} ${args}"
 	    sh "docker build ${args} --no-cache -t ${image} ."
@@ -29,7 +29,9 @@ node {
 	for (int i = 0; i < platforms.size(); ++i) {
 	    //echo "check BUILD_${platforms[i]} -> ${_v}"
 	    if (_envmap["BUILD_${platforms[i]}"] == "1") {
-	        _msg += build_docker("${platforms[i]}")
+			stage("${platforms[i]}-libs") {
+				_msg += build_docker("${platforms[i]}")
+			}
 	    }
 	}
 	echo "${_msg}"