更新maven插件,不然 最新版本android studio/gradle编译报错

	android-maven-plugin:1.2 -> android-maven-gradle-plugin:1.3

Signed-off-by: 筱龙缘 <794334212@qq.com>

Author: xiaolongyuan

build.gradle

@@ -7,7 +7,7 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:1.2.3'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.0'
-        classpath 'com.github.dcendents:android-maven-plugin:1.2'
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.3'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files