Update build tools version.

AndrewScull · AndrewScull · commit 41897d9df5d8 · 2017-05-17T17:19:45.000+01:00
diff --git a/app/build.gradle b/app/build.gradle
@@ -12,7 +12,7 @@ ext {
 
 android {
     compileSdkVersion 'android-O'
-    buildToolsVersion '26.0.0-rc1'
+    buildToolsVersion '26.0.0-rc2'
 
     defaultConfig {
         applicationId "com.afwsamples.testdpc"
