jni+ci+build: Upgrade to use CrystaX 10.2.1

Change-Id: I7ddf71e970aefb44949aa24687ccb67552a4fd0d
diff --git a/build.gradle b/build.gradle
index 6356aab..96a0a6d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.0.0'
+        classpath 'com.android.tools.build:gradle:2.0.0-alpha1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files