Merge pull request #9561 from gilles-peskine-arm/cmake-underscore_D

Fix typo that caused cpp_dummy_build not to be built with CMake

tests/scripts/components-build-system.sh

@@ -65,7 +65,7 @@ component_test_cmake_out_of_source () {
     mkdir "$OUT_OF_SOURCE_DIR"
     cd "$OUT_OF_SOURCE_DIR"
     # Note: Explicitly generate files as these are turned off in releases
-    cmake -D CMAKE_BUILD_TYPE:String=Check -D GEN_FILES=ON _D TEST_CPP=1 "$MBEDTLS_ROOT_DIR"
+    cmake -D CMAKE_BUILD_TYPE:String=Check -D GEN_FILES=ON -D TEST_CPP=1 "$MBEDTLS_ROOT_DIR"
     make
 
     msg "test: cmake 'out-of-source' build"