outside Valgrind, with innodb_use_sys_malloc set to 0 and 1.

mem_init(): Invoke ut_mem_init() before mem_pool_create(), because
the latter one will invoke ut_malloc().

srv_general_init(): Do not initialize the memory subsystem (mem_init()).

innobase_init(): Initialize the memory subsystem (mem_init()) before
calling srv_parse_data_file_paths_and_sizes(), which needs ut_malloc().
Call ut_free_all_mem() in error handling to clean up after the mem_init().