Update gradle to support AS 0.8 beta

Change-Id: I74f432ddfc3f8cacfa9d61a3c39a9ea0d1c2d807
diff --git a/build.gradle b/build.gradle
index d8ddba8..7a2ab0e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -20,15 +20,15 @@
     }
 
     dependencies {
-        classpath "com.android.tools.build:gradle:0.11.+"
+        classpath "com.android.tools.build:gradle:0.12.+"
     }
 }
 
-apply plugin: 'android'
+apply plugin: "com.android.application"
 
 android {
     compileSdkVersion "android-L"
-    buildToolsVersion "19.1"
+    buildToolsVersion "20"
 
     defaultConfig {
         applicationId "com.google.android.apps.calculator"