Add test_suite_psa_crypto_metadata to cmake builds

This test suite was run by make builds, but I had forgotten to add it
to CMakeLists.txt.
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index d8b74f2..a7821d7 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -111,6 +111,7 @@
 add_test_suite(pkwrite)
 add_test_suite(poly1305)
 add_test_suite(psa_crypto)
+add_test_suite(psa_crypto_metadata)
 add_test_suite(shax)
 add_test_suite(ssl)
 add_test_suite(timing)