Add tests for the nist key wrapping feature

Add tests for Key wrapping.
Test vectors taken from the standards.
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 1377dc6..28331ba 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -96,6 +96,7 @@
 add_test_suite(mdx)
 add_test_suite(memory_buffer_alloc)
 add_test_suite(mpi)
+add_test_suite(nist_kw)
 add_test_suite(pem)
 add_test_suite(pkcs1_v15)
 add_test_suite(pkcs1_v21)