Use alias in the Android Manifest. Currently only available in the flavours, not in the buildTypes

Alias AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.myapplication" >

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MyActivity"
            android:label="${label}" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Alias build.groovy

apply plugin: 'com.android.application'

android {
    compileSdkVersion 20
    buildToolsVersion "20.0.0"

    defaultConfig {
        applicationId "com.myapplication"
        minSdkVersion 15
        targetSdkVersion 20
        versionCode 1
        versionName "1.0"
        manifestPlaceholders = [label: "defaultName"]

    }
    buildTypes {
        release {
            runProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    productFlavors {

        flavor1 {
            manifestPlaceholders = [label: "flavor1"]
        }
        flavor2 {
            manifestPlaceholders = [label: "flavor2"]
        }
        flavor3 {
            manifestPlaceholders = [label: "flavor3"]
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
}