buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.4.2'
    }

apply plugin: 'android-library'

repositories {
  mavenCentral()
}

dependencies {
    instrumentTestCompile "junit:junit:4.+"        
}

android {
    compileSdkVersion 17
    buildToolsVersion "17.0.0"

    instrumentTest.setRoot('tests')
    instrumentTest {
      java.srcDirs = ['tests/src']
      res.srcDirs = ['tests/res']
      assets.srcDirs = ['tests/assets']
      resources.srcDirs = ['tests/src']
        }        
    }
}

运行时我收到以下错误：

Error: duplicate files during packaging of APK … Path in archive: LICENSE.txt
Origin 1: ….gradle/caches/artifacts-24/filestore/junit/junit/4.11/jar/4e031bb61df09069aeb2bffb4019e7a5034a4ee0/junit-4.11.jar
Origin 2: ….gradle/caches/artifacts-24/filestore/org.hamcrest/hamcrest-core/1.3/jar/42a25dc3219429f0e5d060061f71acb49bf010a0/hamcrest-core-1.3.jar
:packageTest Failed

FAILURE: Build Failed with an exception.

• What went wrong:
  Execution Failed for task ‘:packageTest’.
  Duplicate files at the same path inside the APK: LICENSE.txt