* configure.tgt (alpha-*-linuxecoff*): New target.
(alpha-*-linux*): Use elf64alpha.
* emulparams/elf64alpha.sh: New file.
* emultempl/elf32.em: If ELFSIZE is not set, set it to 32. Use
${ELFSIZE} rather than 32 when calling BFD routines.
(hold_rodata): New static variable.
(gld${EMULATION_NAME}_place_orphan): Use hold_rodata for a
readonly section that is not code.
(gld${EMULATION_NAME}_place_section): Set hold_rodata. Don't use
a .rel section unless its bfd_section field is not NULL.
* Makefile.in (ALL_EMULATIONS): Add eelf64alpha.o.
(eelf64alpha.c): New target.
