Update build.gradle

Author: xingda920813

build.gradle

@@ -2,17 +2,19 @@
 
 buildscript {
     repositories {
+        google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.android.tools.build:gradle:3.0.0-rc1'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.4'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.4.1'
     }
 }
 
 allprojects {
     repositories {
+        google()
         jcenter()
     }
 }