Gradle build file: creating empty jar and installs it into the local maven repository

build.gradle

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.5.+'
    }
}
apply plugin: 'android'
apply plugin: 'maven'

repositories {
    mavenCentral()
}

android {
    compileSdkVersion 17
    buildToolsVersion "17.0.0"

    defaultConfig {
        minSdkVersion 17
        targetSdkVersion 17
    }
}

dependencies {
    compile 'com.android.support:support-v4:13.0.0'
}

group 'my.groupid'
version '1.0-SNAPSHOT'

uploadArchives {
  repositories.mavenDeployer {
    repository(url: "file:///home/gitlab_ci_runner/maven/")

    pom.project {
      name 'My project name'
      description 'My project description'
      url 'http://my.project.url'
      inceptionYear '2013'
    }
  }
}

task myJar(type: Jar)

artifacts {
  archives myJar
}