Added build test script for wasm example

Author: Conarnar

examples/wasm/test_build_wasm.sh

@@ -0,0 +1,37 @@
+
+set -e
+
+source "$(dirname "${BASH_SOURCE[0]}")/../../.ci/scripts/utils.sh"
+
+test_build_wasm() {
+    local model_name=$1
+    local model_export_name="${model_name}.pte"
+    local model_dir_name="./models_test/"
+    echo "Exporting ${model_name}"
+    mkdir -p "${model_dir_name}"
+    ${PYTHON_EXECUTABLE} -m examples.portable.scripts.export --model_name="${model_name}" --output_dir="$model_dir_name"
+
+    local example_dir=examples/wasm
+    local build_dir=cmake-out/${example_dir}
+    rm -rf ${build_dir}
+    retry emcmake cmake -DWASM_MODEL_DIR="$(realpath "${model_dir_name}")" -B${build_dir} .
+
+    echo "Building ${example_dir}"
+    cmake --build ${build_dir} -j9 --target executor_runner
+
+    echo "Removing ${model_dir_name}"
+    rm -rf "${model_dir_name}"
+
+    echo 'Running wasm build test'
+    node ${build_dir}/executor_runner.js --model_path="${model_export_name}"
+}
+
+if [[ -z $PYTHON_EXECUTABLE ]];
+then
+  PYTHON_EXECUTABLE=python3
+fi
+
+cmake_install_executorch_lib
+
+test_build_wasm add_mul
+test_build_wasm mv2