title: Error:Failed to resolve: Crosswalk
body: <p>I'm trying to make a <code>SDK</code> using <a href="https://crosswalk-project.org/documentation/android.html" rel="nofollow noreferrer">Crosswalk</a>. So first I started to make a sample app using<br>
  <code>compile 'org.xwalk:xwalk_core_library:23.53.589.4'</code>. And it works. Then I tried to make a <code>SDK</code> using this. But it didn't work as I expected. </p>
  
  <p><strong>gradle file</strong>  </p>
  
  <pre><code>apply plugin: 'com.android.library'
  repositories {
      maven {
          url 'https://download.01.org/crosswalk/releases/crosswalk/android/maven2'
      }
  }
  android {
      compileSdkVersion 26
      buildToolsVersion "26.0.2"
  
      defaultConfig {
          minSdkVersion 16
          targetSdkVersion 26
          versionCode 1
          versionName "1.0"
  
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
          exclude group: 'com.android.support', module: 'support-annotations'
      })
      compile 'com.android.support:appcompat-v7:26.0.0-alpha1'
      compile 'org.xwalk:xwalk_core_library:23.53.589.4'
      testCompile 'junit:junit:4.12'
  
  }
  </code></pre>
  
  <p>Here is the screenshot of error message  </p>
  
  <p><a href="https://i.stack.imgur.com/d5DIy.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/d5DIy.png" alt="enter image description here"></a></p>