Update README.org

Update supported architectures as the 3.5.5 release added 64-bit CPU support to the native libraries.

Author: developernotes

README.org

@@ -4,7 +4,7 @@
 
 *** Compatibility
 
-    SQLCipher for Android runs on Android 2.1 - Android N, for =armeabi=, =armeabi-v7a=, and =x86= architectures. SQLCipher for Android does not currently include 64-bit native libaries, however it will work on 64-bit devices. Please read [[https://discuss.zetetic.net/t/sqlcipher-for-android-native-library-support/1440][this]] for additional details.
+    SQLCipher for Android runs on Android 2.1 - Android N, for =armeabi=, =armeabi-v7a=, =x86=, =x86_64=, and =arm64_v8a= architectures.
 
 *** Contributions