cmake: Move cert.o to mbedtls_test_helpers library of objects

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/programs/fuzz/CMakeLists.txt b/programs/fuzz/CMakeLists.txt
index baa5ad9..57cfeee 100644
--- a/programs/fuzz/CMakeLists.txt
+++ b/programs/fuzz/CMakeLists.txt
@@ -28,7 +28,10 @@
 
 foreach(exe IN LISTS executables_no_common_c executables_with_common_c)
 
-    set(exe_sources ${exe}.c $<TARGET_OBJECTS:tf_psa_crypto_test>)
+    set(exe_sources
+        ${exe}.c
+        $<TARGET_OBJECTS:mbedtls_test_helpers>
+        $<TARGET_OBJECTS:tf_psa_crypto_test>)
     if(NOT FUZZINGENGINE_LIB)
         list(APPEND exe_sources onefile.c)
     endif()
diff --git a/programs/ssl/CMakeLists.txt b/programs/ssl/CMakeLists.txt
index 23faf71..513c866 100644
--- a/programs/ssl/CMakeLists.txt
+++ b/programs/ssl/CMakeLists.txt
@@ -38,7 +38,10 @@
             ${CMAKE_CURRENT_SOURCE_DIR}/../test/query_config.h
             ${CMAKE_CURRENT_BINARY_DIR}/../test/query_config.c)
     endif()
-    add_executable(${exe} ${exe}.c $<TARGET_OBJECTS:tf_psa_crypto_test>
+    add_executable(${exe}
+        ${exe}.c
+        $<TARGET_OBJECTS:mbedtls_test_helpers>
+        $<TARGET_OBJECTS:tf_psa_crypto_test>
         ${extra_sources})
     set_base_compile_options(${exe})
     target_link_libraries(${exe} ${libs} ${CMAKE_THREAD_LIBS_INIT})
@@ -54,7 +57,10 @@
 endforeach()
 
 if(THREADS_FOUND)
-    add_executable(ssl_pthread_server ssl_pthread_server.c $<TARGET_OBJECTS:tf_psa_crypto_test>)
+    add_executable(ssl_pthread_server
+        ssl_pthread_server.c
+        $<TARGET_OBJECTS:mbedtls_test_helpers>
+        $<TARGET_OBJECTS:tf_psa_crypto_test>)
     set_base_compile_options(ssl_pthread_server)
     target_include_directories(ssl_pthread_server PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../../framework/tests/include
                                                           ${CMAKE_CURRENT_SOURCE_DIR}/../../tests/include)