[ GPU ] Update android_test.sh to enable unittests for GPU

- This commit updates android_test.sh to enable unittests for GPU
- This commit updates `how-to-use-testcases.md` file, including guide
for running test cases for OpenCL on Android.
- This commit remove add kernel from Android.mk in order to make it
enabled (commented out)
- unittest_layers.tar.gz is updated to add nnlayer golden data  for GPU layers.

**Self evaluation**:

1. Build test: [X]Passed [ ]Failed [ ]Skipped
2. Run test: [X]Passed [ ]Failed [ ]Skipped

Signed-off-by: Eunju Yang <ej.yang@samsung.com>

docs/how-to-use-testcases.md

@@ -16,3 +16,19 @@ $ cd build
 $ ninja test
 ...
 ```
+
+### run test cases on Android
+
+- In order to run unittest on android, please set the environment following [[docs] how-to-run-example-android.md](how-to-run-example-android.md).
+- Then, you can run the unittest on Android as follows:
+
+```
+(nntrainer) $ ./tools/android_test.sh
+(nntrainer) $ adb shell
+(adb) $ cd /data/local/tmp/nntr_android_test
+(adb) $ export LD_LIBRARY_PATH=.
+(adb) $ ./unittest_layers
+```
+
+- For more information, please refer to [tools](../tools/README.md)
+- [**Note**] Android unittest script builds NNTrainer to support GPU by default.

test/jni/Android.mk

@@ -458,7 +458,6 @@ LOCAL_SRC_FILES := \
 	 ../unittest/layers/unittest_layers_flatten.cpp \
 	 ../unittest/layers/unittest_layers_activation.cpp \
 	 ../unittest/layers/unittest_layers_addition.cpp \
-	 ../unittest/layers/unittest_layers_addition_cl.cpp \
 	 ../unittest/layers/unittest_layers_multiout.cpp \
 	 ../unittest/layers/unittest_layers_rnn.cpp \
 	 ../unittest/layers/unittest_layers_rnncell.cpp \
@@ -476,6 +475,7 @@ LOCAL_SRC_FILES := \
 	 ../unittest/layers/unittest_layers_reshape.cpp \
 	 ../unittest/layers/unittest_layers_multi_head_attention.cpp \
 	 ../unittest/layers/unittest_layers_positional_encoding.cpp \
+	#  ../unittest/layers/unittest_layers_addition_cl.cpp \
 
 LOCAL_C_INCLUDES += $(NNTRAINER_INCLUDES)
 

tools/android_test.sh

@@ -30,6 +30,7 @@ if [ $? != 0 ]; then
 fi
 
 adb shell mkdir -p /data/local/tmp/nntr_android_test/res
+adb shell mkdir -p /data/local/tmp/nntr_android_test/nntrainer_opencl_kernels
 
 adb push . /data/local/tmp/nntr_android_test
 
@@ -42,5 +43,8 @@ fi
 # The steps are as follows.
 
 # $ meson build [flags...]
-# $ cd build
-# $ adb push res/ /data/local/tmp/nntr_android_test
+# meson build will unzip golden data for the unit tests
+cd ../../../
+meson build
+cd build
+adb push res/ /data/local/tmp/nntr_android_test