* acinclude.m4, aclocal.m4: move gettext-related fragments from
        aclocal.m4 to acinclude.m4, so they don't get lost.
        * elfcore.h: rewrite for better corefile support.
        * elf.c (elfcore_*): new functions.
        * elf-bfd.h (elf_obj_tdata): new structure members.
        * acconfig.h, acinclude.m4, configure.in: add feature-tests for
        flavor of procfs.
        * aclocal.m4, config.in, configure, Makefile.in: regenerated.
include:
        * common.h (NT_PSTATUS, NT_FPREGS, NT_PSINFO,
        NT_LWPSTATUS,NT_LWPSINFO): added.
        * internal.h (Elf_Internal_Note): new structure members.