Update build versions for support library 25

Change-Id: Id0f19147e3dc5e73c03455b74a838a40cd4cbe14
diff --git a/build.gradle b/build.gradle
index 9d02725..258d4d0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -30,8 +30,8 @@
     doclava project(':doclava')
 }
 
-ext.supportVersion = '25.0.0-SNAPSHOT'
-ext.extraVersion = 36
+ext.supportVersion = '25.0.0'
+ext.extraVersion = 39
 ext.supportRepoOut = ''
 ext.buildToolsVersion = '23.0.2'
 ext.buildNumber = Integer.toString(ext.extraVersion)