PR29915, bfdio.c does not compile with mingw.org's MinGW PR 29915 * configure.ac: Add AC_CHECK_DECLS test ___lc_codepage_func. * configure: Regenerate. * config.in: Regenerate. * bfdio.c (___lc_codepage_func): Move declaration to.. (_bfd_real_fopen): ..here, and use !HAVE_DECL____LC_CODEPAGE_FUNC.