New source file for configuration checks

This will be populated in subsequent commits.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index 451dbfd..0875bb9 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -1,5 +1,6 @@
 set(src_x509
     error.c
+    mbedtls_config.c
     pkcs7.c
     x509.c
     x509_create.c