Add support for openVMS/Alpha.
* as.h (PRINTF_LIKE): Don't define if VMS, for now.
* config/obj-evax.c: New file.
* config/obj-evax.h: New file.
* config/tc-alpha.c: Add support for EVAX format if OBJ_EVAX is
defined.
* config/tc-alpha.h: Add support for EVAX format if OBJ_EVAX is
defined. Add case for bfd_target_evax_flavour.
* config/vms-a-conf.h: New file.
* conf-a-gas.com: New file.
* configure.in: Add target alpha-*-*vms*.
* configure: Rebuild.
* makefile.vms: New file.
* read.c (s_lcomm): Align bss_seg on 8 byte boundary if OBJ_EVAX.
Don't call ffs on openVMS/Alpha.
