* machine/Makefile.am: Use 'PREINSTALL_FILES ='.
* net/Makefile.am: Use 'PREINSTALL_FILES ='.
* netinet/Makefile.am: Use 'PREINSTALL_FILES ='.
* vm/Makefile.am: Use 'PREINSTALL_FILES ='.
* pppd/Makefile.am: Use 'PREINSTALL_FILES ='.
* sys/Makefile.am: Use 'PREINSTALL_FILES ='.
* rtems_servers/Makefile.am: Use 'PREINSTALL_FILES ='.
* arpa/Makefile.am: Use 'PREINSTALL_FILES ='.
* nfs/Makefile.am: Use 'PREINSTALL_FILES ='.
* rtems_webserver/Makefile.am: Use 'PREINSTALL_FILES ='.
* rtems/Makefile.am: Use 'PREINSTALL_FILES ='.
* rtems_telnetd/Makefile.am: Use 'PREINSTALL_FILES ='.