* config/alpha/t-vms (EXTRA_PARTS): Append $(VMS_EXTRA_PARTS)
	Add rules for building [vp]crt0.o
	* config/alpha/vms.h (START_FILE_SPEC): Define.
	* config/alpha/x-vms (VMS_EXTRA_PARTS): Define
	* config/alpha/vms-crt0.c, config/alpha/vms-psxcrt0.c: New files.
	* doc/invoke.texi: Document special Alpha/VMS options.

From-SVN: r47831