Upgrade gradle building environment to 2.2.3

Signed-off-by: Leo Ma <begeekmyfriend@gmail.com>

app/build.gradle

 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.3"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.2"
 
     defaultConfig {
         applicationId "net.ossrs.yasea.demo"
@@ -25,6 +25,6 @@ android {
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:24.2.1'
+    compile 'com.android.support:appcompat-v7:25.0.1'
     compile project(path: ':library')
 }

build.gradle

@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.2'
+        classpath 'com.android.tools.build:gradle:2.2.3'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files