feat: unit-test with cmocka

- Test only 1 function which is in utils2.c
    - Because is not inlude nano sdk
- Move zemu's into functional folder
    - Change path of zemu's test in CI and Makefile

.github/workflows/ci-workflow.yml

@@ -114,13 +114,13 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Build testing binaries
-        run: cd tests && ./build_local_test_elfs.sh
+        run: cd tests/functional/ && ./build_local_test_elfs.sh
 
       - name: Upload app binaries
         uses: actions/upload-artifact@v2
         with:
           name: e2e_elfs
-          path: ./tests/elfs/
+          path: ./tests/functional/elfs/
 
   jobs-e2e-tests:
     name: E2E tests
@@ -146,10 +146,10 @@ jobs:
         run: npm install -g yarn
 
       - name: Build/Install build js deps
-        run: cd tests && yarn install
+        run: cd tests/functional/ && yarn install
 
       - name: Create tmp folder for artifacts
-        run: mkdir tests/elfs
+        run: mkdir tests/functional/elfs
 
       - name: Download app binaries
         uses: actions/download-artifact@v2
@@ -157,7 +157,7 @@ jobs:
           path: tmp/
 
       - name: Gather elfs
-        run: cp `find tmp/e2e_elfs/ -name "*.elf"` tests/elfs/
+        run: cp `find tmp/e2e_elfs/ -name "*.elf"` tests/functional/elfs/
 
       - name: Run zemu tests
-        run: cd tests && yarn test
+        run: cd tests/functional/ && yarn test