Add dependency of tf_psa_crypto_config on generated config check headers

Fix the build of libtfpsacrypto when generated files are not already present.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/library/Makefile b/library/Makefile
index 21f85b6..a0b6d6e 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -356,6 +356,8 @@
 	echo "  Gen   $(TF_PSA_CRYPTO_GENERATED_CONFIG_CHECK_FILES)"
 	$(PYTHON) $(TF_PSA_CRYPTO_CORE_PATH)/../scripts/generate_config_checks.py
 
+$(TF_PSA_CRYPTO_CORE_PATH)/tf_psa_crypto_config.o: $(TF_PSA_CRYPTO_GENERATED_CONFIG_CHECK_FILES)
+
 clean:
 ifndef WINDOWS
 	rm -f *.o *.s libmbed*