Android gradle sourceSets

需要不同渠道对应不同src lib res的时候，包括debug,release要分离时，可以用下面的方法设置：

sourceSets
{
    main {
          assets.srcDir "src/main/assets"
          manifest.srcFile "src/main/AndroidManifest.xml"

          debug  {
              jniLibs.srcDir 'src/main/jniDebugLibs'
          }

          release  {
              jniLibs.srcDir 'src/main/jniReleaseLibs'
          }
        }

      officalandr.java.srcDir "app/officalandr/src"
      officalandr.res.srcDir "app/officalandr/res"
      officalandr.jniLibs.srcDir "app/officalandr/libs"
      officalandr.manifest.srcFile "app/officalandr/AndroidManifest.xml"
}