add bsdiff in ndk module.

android/build.gradle

@@ -9,6 +9,13 @@ android {
         targetSdkVersion 23
         versionCode 1
         versionName "1.0"
+
+        ndk {
+            moduleName "rnupdate"
+            ldLibs "log"
+            abiFilters "armeabi-v7a", "x86"
+        }
+
     }
 }