title: Sourcesets causes: app/AndroidManifest.xml' specified for property 'manifest' does not exist error
body: <p>I have 4 product flavours.  I am looking to set the source sets in order to assign the correct app name string and launcher Icon..</p>
  
  <p>here is my gradle:</p>
  
  <pre><code>defaultConfig {
      applicationId "com.test.testing"
      minSdkVersion 14
      targetSdkVersion 21
      versionCode 1
      versionName "0.0.4"
  }
  
  productFlavors{
  
      flavour1{
          applicationId "com.etlie.stockclient.flavour1"
      }
  
      flavour2{
          applicationId "com.etlie.stockclient.flavour2"
      }
  
      flavour3{
          applicationId "com.etlie.stockclient.flavour3"
      }
  
      flavour4{
          applicationId "com.etlie.stockclient.flavour4"
      }
  }
  
  sourceSets{
      main{
          manifest.srcFile 'AndroidManifest.xml'
          java.srcDirs = ['src']
          resources.srcDirs = ['src']
          aidl.srcDirs = ['src']
          renderscript.srcDirs = ['src']
          res.srcDirs = ['res']
          assets.srcDirs = ['assets']
      }
  
      flavour1{
          res.srcDir 'variants/flavour1/res'
      }
  
      flavour2{
          res.srcDir 'variants/flavour2/res'
      }
  
      flavour3{
          res.srcDir 'variants/flavour3/res'
      }
      flavour4{
          res.srcDir 'variants/flavour4/res'
      }
  }
  </code></pre>
  
  <p>Here is the product structure:</p>
  
  <pre><code>app
  --java
  --main
   |__AndroidManifest
  --variant
   |__flavour1
     |__drawable-hdpi
     |__drawable-xhdpi
     |__drawable-xxhdpi
     |__values
   |__flavour2
     |__drawable-hdpi
     |__drawable-xhdpi
     |__drawable-xxhdpi
     |__values
   |__flavour3
     |__drawable-hdpi
     |__drawable-xhdpi
     |__drawable-xxhdpi
     |__values
   |__flavour4
     |__drawable-hdpi
     |__drawable-xhdpi
     |__drawable-xxhdpi
     |__values
  </code></pre>
  
  <p>So the project structure has changed, but the location of the AndroidManifest.xml hasn't.  If anyone knows how to fix this error I'd appreciate some help</p>