[Patch] RDOS now with thread support

[Leif Ekblad]

I forgot the changelog. It follows here:

2006-01-21  Leif Ekblad  leif@rdos.net

* config.build: Added support for RDOS build
	* config.gcc: Added support for RDOS
	* config.host: Added support for RDOS host
* gthr.h: Added RDOS threads
* config/i386/rdos.h: New RDOS configuration file
* gthr-rdos.h: New RDOS threads file 

Leif Ekblad
http://www.rdos.net/rdos