Build x86_64 as well

Author: kirklandsign

examples/demo-apps/android/LlamaDemo/setup.sh

@@ -15,6 +15,7 @@ export BUILD_AAR_DIR
 
 build_jar
 build_android_native_library "arm64-v8a"
+build_android_native_library "x86_64"
 build_aar
 mkdir -p "$BASEDIR"/app/libs
 cp "$BUILD_AAR_DIR/executorch.aar" "$BASEDIR"/app/libs/executorch-llama.aar