* harbour/source/rtl/filesys.c
* added workaround for missing S_IREAD, S_IWRITE and S_IEXEC in OS2
when _XOPEN_SOURCE is defined
* harbour/source/rtl/filesys.c
* added workaround for missing S_IREAD, S_IWRITE and S_IEXEC in OS2
when _XOPEN_SOURCE is defined