Enable build of the new ecp_new.c file

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index 8e70c46..6fa21fa 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -37,6 +37,7 @@
     ecdsa.c
     ecjpake.c
     ecp.c
+    ecp_new.c
     ecp_curves.c
     entropy.c
     entropy_poll.c