CMake,Windows - cleanup data directory prior to bootstrap for nitial_database target

sql/CMakeLists.txt

@@ -401,9 +401,11 @@ IF(WIN32 AND MYSQLD_EXECUTABLE)
   MAKE_DIRECTORY(${CMAKE_CURRENT_BINARY_DIR}/data)
   ADD_CUSTOM_COMMAND(
      OUTPUT initdb.dep
-     COMMAND ${CMAKE_COMMAND}
+     COMMAND ${CMAKE_COMMAND} -E remove_directory data
+     COMMAND ${CMAKE_COMMAND} -E make_directory data
+     COMMAND ${CMAKE_COMMAND} -E chdir data ${CMAKE_COMMAND}
      ${CONFIG_PARAM} -P ${CMAKE_CURRENT_BINARY_DIR}/create_initial_db.cmake
-     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/data
+     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/
      DEPENDS mysqld
   )
   ADD_CUSTOM_TARGET(initial_database