Update the test cases' source code to solve the conflict of test function name,like below:"/home/yangjiao/Vela_Project/vela_TinyCrypt/apps/crypto/tinycrypt/tinycrypt/tests/test_sha256.c:149: multiple definition of `test_5'; /home/yangjiao/Vela_Project/vela_TinyCrypt/nuttx/staging/libapps.a(test_hmac_prng.c.home.yangjiao.Vela_Project.vela_TinyCrypt.apps.crypto.tinycrypt.o):/home/yangjiao/Vela_Project/vela_TinyCrypt/apps/crypto/tinycrypt/tinycrypt/tests/test_hmac_prng.c:316: first defined here".
Signed-off-by: yangjiao <yangjiao@xiaomi.com>
