每个ABI的构建任务不适用于Gradle插件3.0.1？

Question

以下build.gradle适用于Gradle Plugin v2.3.2（但不适用于3.0.1），允许在CLI运行./gradlew assembleX86Release：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.example.android"
        minSdkVersion 21
        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'
        }
    }
    buildToolsVersion '27.0.3'
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    splits {

        // Configures multiple APKs based on ABI.
        abi {

            // Enables building multiple APKs per ABI.
            enable true

            // By default all ABIs are included, so use reset() and include to specify that we only
            // want APKs for x86, armeabi-v7a, and mips.

            // Resets the list of ABIs that Gradle should create APKs for to none.
            reset()

            // Specifies a list of ABIs that Gradle should create APKs for.
            include "x86", "armeabi-v7a", "mips"

            // Specifies that we do not want to also generate a universal APK that includes all ABIs.
            universalApk false
        }
    }
}

// Map for the version code that gives each ABI a value.
ext.abiCodes = ['armeabi-v7a':1, mips:2, x86:3]

import com.android.build.OutputFile

// For each APK output variant, override versionCode with a combination of
// ext.abiCodes * 1000 + variant.versionCode. In this example, variant.versionCode
// is equal to defaultConfig.versionCode. If you configure product flavors that
// define their own versionCode, variant.versionCode uses that value instead.
android.applicationVariants.all { variant ->

    // Assigns a different version code for each output APK
    // other than the universal APK.
    variant.outputs.each { output ->

        // Stores the value of ext.abiCodes that is associated with the ABI for this variant.
        def baseAbiVersionCode =
                // Determines the ABI for this variant and returns the mapped value.
                project.ext.abiCodes.get(output.getFilter(OutputFile.ABI))

        // Because abiCodes.get() returns null for ABIs that are not mapped by ext.abiCodes,
        // the following code does not override the version code for universal APKs.
        // However, because we want universal APKs to have the lowest version code,
        // this outcome is desirable.
        if (baseAbiVersionCode != null) {

            // Assigns the new version code to versionCodeOverride, which changes the version code
            // for only the output APK, not for the variant itself. Skipping this step simply
            // causes Gradle to use the value of variant.versionCode for the APK.
            output.versionCodeOverride =
                    baseAbiVersionCode * 1000 + variant.versionCode
        }
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}

在版本3.0.1中，返回以下错误：

$ ./gradlew assembleX86Release
 FAILURE: Build failed with an exception.

* What went wrong:
Task 'assemblex86Release' not found in root project 'MyApplication'.
Some candidates are: 'assembleRelease'.

然而./gradlew assembleRelease正在创建所有拆分APK。

是否需要为每个ABI构建APK所需的任何其他配置，或者这是一个Gradle插入错误？