Re-add tests/include and tests/src paths to tests

Some tests need the SSL-related parts of tests/include and tests/src
which stayed in Mbed TLS. Add these parts to the mbedtls_test target

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ca79882..c6d31dc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -347,6 +347,7 @@
 #
 if(ENABLE_TESTING OR ENABLE_PROGRAMS)
     file(GLOB MBEDTLS_TEST_FILES
+         ${CMAKE_CURRENT_SOURCE_DIR}/tests/src/*.c
          ${CMAKE_CURRENT_SOURCE_DIR}/framework/tests/src/*.c
          ${CMAKE_CURRENT_SOURCE_DIR}/framework/tests/src/drivers/*.c)
     add_library(mbedtls_test OBJECT ${MBEDTLS_TEST_FILES})
@@ -383,6 +384,7 @@
     endif()
     target_include_directories(mbedtls_test
         PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/framework/tests/include
+        PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/tests/include
         PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
         PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/library)
     # Request C11, needed for memory poisoning tests