Sort lists in CMakeLists.txt files

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/programs/CMakeLists.txt b/programs/CMakeLists.txt
index 61f02e8..a8492c6 100644
--- a/programs/CMakeLists.txt
+++ b/programs/CMakeLists.txt
@@ -8,5 +8,5 @@
 add_subdirectory(random)
 add_subdirectory(ssl)
 add_subdirectory(test)
-add_subdirectory(x509)
 add_subdirectory(util)
+add_subdirectory(x509)