Add test suite for tinycrypt

Initially add a test for ECDH-part.
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 5938a5f..2ea77e7 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -133,6 +133,7 @@
 add_test_suite(shax)
 add_test_suite(ssl)
 add_test_suite(timing)
+add_test_suite(tinycrypt)
 add_test_suite(rsa)
 add_test_suite(version)
 add_test_suite(xtea)