Fix python tests that use broken generator expressions

--- a/googletest/cmake/internal_utils.cmake
+++ b/googletest/cmake/internal_utils.cmake
@@ -247,12 +247,12 @@
       add_test(
         NAME ${name}
         COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-            --build_dir=${CMAKE_CURRENT_BINARY_DIR}/$<CONFIGURATION>)
+            --build_dir=${CMAKE_CURRENT_BINARY_DIR})
     else (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 3.1)
       add_test(
         ${name}
         ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-          --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE})
+          --build_dir=${CMAKE_CURRENT_BINARY_DIR})
     endif (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 3.1)
   endif()
 endfunction()