Support com.android.tools.build.gradle 1.3.0-beta1

#KT-7884 Fixed

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinPlugin.kt

@@ -370,6 +370,10 @@ open class KotlinAndroidPlugin [Inject] (val scriptHandler: ScriptHandler, val t
             logger.kotlinDebug("Process variant [$variantDataName]")
 
             val javaTask = AndroidGradleWrapper.getJavaCompile(variantData)
+            if (javaTask == null) {
+                logger.info("KOTLIN: javaTask is missing for $variantDataName, so Kotlin files won't be compiled for it")
+                continue
+            }
 
             val kotlinTaskName = "compile${variantDataName.capitalize()}Kotlin"
             val kotlinTask = tasksProvider.createKotlinJVMTask(project, kotlinTaskName)

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/android/AndroidGradleWrapper.groovy

@@ -9,6 +9,7 @@ import org.gradle.api.internal.DefaultDomainObjectSet
 import org.gradle.api.tasks.compile.AbstractCompile
 import org.gradle.api.tasks.util.PatternFilterable
 import org.jetbrains.annotations.NotNull
+import org.jetbrains.annotations.Nullable
 
 class AndroidGradleWrapper {
   static def getRuntimeJars(BasePlugin basePlugin, BaseExtension baseExtension) {
@@ -44,9 +45,15 @@ class AndroidGradleWrapper {
     return variant.getBuildType().getName()
   }
 
-  @NotNull
+  @Nullable
   static def AbstractCompile getJavaCompile(Object baseVariantData) {
-    return baseVariantData.javaCompileTask
+    if (baseVariantData.getMetaClass().getMetaProperty("javaCompileTask")) {
+      return baseVariantData.javaCompileTask
+    }
+    else if (baseVariantData.getMetaClass().getMetaProperty("javaCompilerTask")) {
+      return baseVariantData.javaCompilerTask
+    }
+    return null
   }
 
   @NotNull