Add xor example to Android JNI setup

Summary:
In preparation for adding the Android JNI, add the xor training
model to the test prep script.

Test Plan:
Ensure that xor_only.pte, xor.pte, and xor.ptd are generated. Check
CI is successful.

Author: georgehong

.gitignore

@@ -26,6 +26,7 @@ pip-out/
 *.model
 tokenizer.json
 *.pte
+*.ptd
 !test_bpe_tokenizer.bin
 !test_tiktoken_tokenizer.model
 

extension/android/executorch_android/android_test_setup.sh

@@ -18,6 +18,12 @@ prepare_add() {
   python3 -m test.models.export_program --modules "ModuleAdd" --outdir "${BASEDIR}/src/androidTest/resources/"
 }
 
+prepare_xor() {
+  python3 -m extension.training.examples.XOR.export_model  --outdir "${BASEDIR}/src/androidTest/resources/"
+  mv "${BASEDIR}/src/androidTest/resources/xor.pte" "${BASEDIR}/src/androidTest/resources/xor_only.pte"
+  python3 -m extension.training.examples.XOR.export_model  --outdir "${BASEDIR}/src/androidTest/resources/" --external
+}
+
 prepare_tinyllama() {
   pushd "${BASEDIR}/../../../"
   curl -C - -Ls "https://huggingface.co/karpathy/tinyllamas/resolve/main/stories15M.pt" --output stories15M.pt
@@ -43,5 +49,6 @@ prepare_vision() {
 }
 
 prepare_add
+prepare_xor
 prepare_tinyllama
 prepare_vision