* elf64-alpha.c (elf64_alpha_relax_with_lituse): Relax jsr to

    * elf64-alpha.c (elf64_alpha_relax_with_lituse): Relax jsr to
        undefweak to use zero register.  Call elf64_alpha_relax_got_load
        if not all uses removed.
        (elf64_alpha_relax_got_load): Relax undefweak to lda zero.
        (elf64_alpha_relax_section): Handle undefweak symbols.
        (elf64_alpha_calc_dynrel_sizes): Don't add relocs for undefweak.
        (elf64_alpha_size_rela_got_1): Likewise.
        (elf64_alpha_relocate_section): Likewise.

        * elf64-alpha.c (elf64_alpha_relax_section): Only operate
        on SEC_CODE sections.