add native win32 mutex code.
Question: with pthread, if a mutex is initialized with
PTHREAD_MUTEX_INITIALIZER, should it be destroyed with
pthread_mutex_destroy() ?
SVN revision: 53772
NOTE: right now only help with file listing and provide a
wrapper around eina_file_ls and eina_file_direct_ls and ecore_long_run.
But the idea is to do the same with all Ecore_File code so that one
day we can remove Ecore_File.
SVN revision: 50429