* configure.in(interix Alpha): Add.
	* configure.in(winnt Alpha): Use alpha32.h
	* configure.in(interix i386): Parallel Alpha32.
	* config/interix.h: Move common elements from i386-interix.h.
	* config/i386/i386-interix.h: Delete same.
	* config/alpha/alpha-interix.h: New file
	* config/alpha/alpha32.h: New file, part fron win-nt.h.
	* config/alpha/win-nt.h: Deletions (-> alpha32.h).
	* config/alpha/interix.h:  New file
	* config/alpha/alpha.md (interix): Comment.
	* config/alpha/xm-alpha-interix.h: New file.
        * config/alpha/t-interix: New file.
	* fixinc/mkfixinc.sh (interix/Alpha): Add.

Co-Authored-By: Martin Heller <Ing.-Buero_Heller@t-online.de>

From-SVN: r26424