Use unified path /data/local/tmp/llama (#2899)

Summary: Pull Request resolved: #2899

Reviewed By: mergennachin

Differential Revision: D55829514

Pulled By: kirklandsign

fbshipit-source-id: 3e5d222b969c7b13fc8902dbda738edb3cb898dc

Author: kirklandsign

.gitignore

@@ -2,6 +2,7 @@
 buck-out/
 cmake-out/
 cmake-android-out/
+cmake-out-android/
 cmake-ios-out/
 ethos-u-scratch/
 executorch.egg-info

examples/models/llama2/README.md

@@ -208,14 +208,15 @@ cmake --build cmake-out-android/examples/models/llama2 -j16 --config Release
 
 **2.2 Upload model, tokenizer and llama runner binary to phone**
 ```
-adb push <model.pte> /data/local/tmp/
-adb push <tokenizer.bin> /data/local/tmp/
-adb push cmake-out-android/examples/models/llama2/llama_main /data/local/tmp/
+adb shell mkdir -p /data/local/tmp/llama
+adb push <model.pte> /data/local/tmp/llama/
+adb push <tokenizer.bin> /data/local/tmp/llama/
+adb push cmake-out-android/examples/models/llama2/llama_main /data/local/tmp/llama/
 ```
 
 **2.3 Run model**
 ```
-adb shell "cd /data/local/tmp && ./llama_main --model_path <model.pte> --tokenizer_path <tokenizer.bin> --prompt "Once upon a time" --seq_len 120
+adb shell "cd /data/local/tmp/llama && ./llama_main --model_path <model.pte> --tokenizer_path <tokenizer.bin> --prompt "Once upon a time" --seq_len 120
 ```
 ## Step 6: Build iOS and/or Android apps