Backport of upstream fix for -Werror=redundant-decls errors.

2012-03-29  Alan Modra  <amodra@gmail.com>

   * bfd-in.h (bfd_get_arch_size, bfd_get_sign_extend_vma): Delete.
   * bfd-in2.h: Regenerate.

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commitdiff;h=f67f98b55b74d346ef535a01efdcc467f220b356